Aptitude Questions And Answers

161⟩ Which one of the following has the highest standard deviation?a 1,0,1,0,1b 1,1,1,1,1c -1,-1,-1,-1,-1

Standard deviation (sum of all terms)/(no of terms)....

so, option b has highest S.D

(1+1+1+1+1)/5 EQUALS TO 1

Is this answer helpful? 0 Yes | 0 No

Answer This Question

196 views

162⟩ In a 60 liters of mixture of spirit and water is 7 %. In order to make water 19%, how much water should be added?

60*7/100=4.2 liter water right now therenow we assume we consider p liter water to make it 19%so(60+p)*19/100=p+4.2so p=8.8

Is this answer helpful? 0 Yes | 0 No

Answer This Question

210 views

163⟩ Ten boxes are there. Each ball weighs 100 gms. One ball is weighing 90 gms. i) If there are 3 balls (n=3) in each box, how many times will it take to find 90 gms ball? ii) Same question with n=10 iii) Same question with n=9

If n=3 then answer is:1

Take two balls and weigh. If both are equal then remaning ball is 90 gms

else if second is less than first one then second ball is 90gms

else if first is less than second on then first ball is 90 gms

If n=10 answer is: 3

Divide the n=10 into two 5-sub groups

compare the both the groups

If 1group<2group then 90 gms ball is present in the first group

else it is present in the second group.

Take the less weight group and divide it into 2-2-1 subgroup.

Now compare the 2-subgroups first. If first 2-subgroup is less than the second 2-subgroup then 90gms is present in the first 2-subgroup otherwise it is present in the second 2-subgroup. If both are equal then the remaing 1-subgroup ball is 90gms ball.

Now take less weigth subgroup of 2-subgroups. Now compare the two balls that are existing in the 2-subgroup group. Then we can find the 90 gms ball.

So we require 3 chances for detection of 90 gms ball when n=10

If n=9 then answer is :3

Is this answer helpful? 0 Yes | 0 No

Answer This Question

195 views

164⟩ There are two square rooms. Both are of same height. The second room is 5m longer than the first room. The rate for papering the walls is 10 paisa per square meter. The total cost for papering the rooms is Rs 60 and Rs 80. What is the height of the rooms?

A house will have four walls...

papers used only for construction of walls!!!!

1st House: 4 *a (side) *h (height) * 10 = 60 =======> 4ah=6 --(1)

Given 10 paise reqd...per construction of 1 square meters

2nd House: 4*(a+5) (side)*h (height) * 10 = 80 =======> 4ah + 20h=8---(2)

Area formula will be horizontal side*vertical height

the plane of wall will be along it's height!..

Solving (1) & (2) we get 20h=2.

Hence, h=0.1m

Is this answer helpful? 0 Yes | 0 No

Answer This Question

182 views

165⟩ There is a point P on the circle. A and B started running in two constant different speeds. A in Clockwise and B in Anti-clockwise. A meet B First time 500m in Clockwise from P then second time 400m Anti-clockwise from P. B is yet to complete one round, What is the circumference of the circle?

Plz share answers.

Is this answer helpful? 0 Yes | 0 No

Answer This Question

179 views

166⟩ What is 5x - x^2 = 0 ?

x^2-5x=0

x(x-5)=0

so x=0 or 5

Is this answer helpful? 0 Yes | 0 No

Answer This Question

184 views

167⟩ What is the sum of all the four digit numbers formed using the digits 0, 1, 2 and 3. None of the two digits should be repeated?

Process of solving

From these four digits '0' cannot be at first place to form four digit number

so we have 1, 2, or 3 can be at thousand's place

keeping one digit at thousand place can have 6 different four digit number

so that means

1000*6 + 2000* 6 + 3000* 6 = 36000

Now come to hundred's place we can have all four digit at this place , '0' will not contribute any thing to sum so in all four digits number 1,2,3 will be at 4 times on same place

so that means

100*4 + 200* 4 + 300 * 4= 2400

Now come to tenth's place ...same as hundred

so

10*4 + 20*4 + 30*4= 240

same for unit place

1*4 + 2*4 + 3*4= 24

in last if you add whole the total sum of all possible four digit number formed is 38664

Is this answer helpful? 0 Yes | 0 No

Answer This Question

245 views

168⟩ A tree grows only 3/5 as fast as the one beside it. In four years the combined growth of the two trees is eight feet.How much does the shorter tree grow in two years?(a) Less than 2 feet (b) 2feet (c) 2 1/2 feet(d) 3 feet (e) more than 3 feet.

even after 4 years the ratio remains d same..therefore:

x+(3/5)x=8

thus x=5

therefore the height of the shorter tree is 3 feet after FOUR years..

therefore after TWO years the heght will be 1.5 ft..

Is this answer helpful? 0 Yes | 0 No

Answer This Question

194 views

169⟩ A 5 liter jug contains 4 liters of a salt water solution that is 15 percent salt. If 1.5 liters of the solution spills out of the jug, and the jug is then filled to capacity with water, approximately what percent of the resulting solution in the jug is salt?

7.5 Percent

Is this answer helpful? 0 Yes | 0 No

Answer This Question

207 views

170⟩ A work is done by the people in 24 min. One of them can do this work alone in 40 min. How much time required to do the same work for the second person?

Two people work together in 24 mins.

So, their one day work is

(1/A)+(1+B)=(1/24)

One man can complete the work in 40mins

one man's one day work (1/B)= (1/40)

Now,

(1/A)=(1/24)-(1/40)

(1/A)=(1/60)

So, A can complete the work in 60 mins.

Is this answer helpful? 0 Yes | 0 No

Answer This Question

213 views

171⟩ How do you calculate your production per 100 man hours? What is the formula? Cycle Time (CT) is 171 seconds per unit for 1 type of product made in that work center and CT is 307 seconds for another type of product made in that same work center?

Plz share answers.

Is this answer helpful? 0 Yes | 0 No

Answer This Question

190 views

172⟩ There are 4 balls and 4 boxes of colors yellow, pink, red and green. Red ball is in a box whose color is same as that of the ball in a yellow box. Red box has green ball. In which box you find the yellow ball?

Ans is PINK

Yellow --- > Pink

Pink ------->Red

Red ------->Green

Green -----> Yellow

Is this answer helpful? 0 Yes | 0 No

Answer This Question

199 views

173⟩ It cost a college Rs.0.70 a copy to produce a Program for the homecoming football game. If Rs.15,000/- was received for advertisements in the program, how many copies at Rs.0.50 a copy must be sold to make a profit of Rs.8000/- ?

Plz share answers.

Is this answer helpful? 0 Yes | 0 No

Answer This Question

225 views

174⟩ + means * and * means / and / means % what is the value of 2+3*5/7?

7 is the answer, because 2*3=6,6/5=1.2 and 1.2%7=7

Is this answer helpful? 0 Yes | 0 No

Answer This Question

209 views

175⟩ Paul, the octopus who has been forecasting the outcome of FIFA world cup matches with tremendous accuracy has now been invited to predict ICC world cup matches in 2011. We will assume that the world cup contenders have been divided into 2 groups of 9 teams each. Each team in a group plays the other teams in the group. The top two teams from each group enter the semi finals (after which the winner is decided by knockout).However, Paul has a soft spot for India and when India plays any team, Paul always backs India. Alas, his predictions on matches involving India are right only 2 out of 3 times. In order to qualify for the semi finals, it is sufficient for India to win 7 of its group matches. What is the probability that India will win the ICC world cup?

We have two chances to win the world cup.

Either India can win all 10matches or Win 7 out of 8 group matches + win the semi final and final matches.

Case 1: To win all 10, probability is (2/3)^10.

Case 2: Probability of winning 7mathces out of 8= (2/3)^7 and

Probability of Loosing the 1 match= 1/3.

This process can occur in 8 ways.

probability= 8*((2/3)^7 * 1/3)

To win semi final and final match probability is (2/3)^2

Total probability=8*((2/3)^7 * 1/3) * (2/3)^2 = 8/3 * (2/3)^9.

So total probability, Case1+Case 2= (2/3)^10 + 8/3 * (2/3)^9

Is this answer helpful? 0 Yes | 0 No

Answer This Question

206 views

176⟩ There is a six digit code. Its first two digits, multiplied by 3 gives all ones. And the next two digits multiplied by 6 give all twos. Remaining two digits multiplied by 9 gives all threes. Then what is the code?

1st 2 digit- 111/3=37

2nd 2 digit- 222/6=37

3rd 2 digit- 333/9=37

so the number=373737

Is this answer helpful? 0 Yes | 0 No

Answer This Question

194 views

177⟩ If a factory manufactures 7200 bottles in 1 hour, how much does it manufactures in 1 second?a)120b)2C)1200d)60

1hour 7200 Bottles

1 min 7200/60 = 120 Bottles

1 sec 120/60 = 2 Bottles

Is this answer helpful? 0 Yes | 0 No

Answer This Question

197 views

178⟩ Falling height is proportional to square of the time. One object falls 64cm in 2sec than in 6sec from how much height the object will fall?

The falling height is proportional to the squere of the time.

Now,the falling height is 64cm at 2sec

so, the proportional constant is=64/(2*2)=16;

so, at 6sec the object fall maximum (16*6*6)cm=576cm;

Now, the object may be situated at any where .

if it is>576 only that time the object falling 576cm within 6sec .Otherwise if it is situated<576 then it fall only that height at 6sec.

Is this answer helpful? 0 Yes | 0 No

Answer This Question

207 views

179⟩ Gavaskar average in first 50 innings was 50. After the 51st innings his average was 51 how many runs he made in the 51st innings?

LEt number or runs made be x in 51th match

In all 50 matches gavaskars average is 50

so current avg= 50*50 +x/51=51

so value of 101 runs

Is this answer helpful? 0 Yes | 0 No

Answer This Question

193 views

180⟩ 2 oranges, 3 bananas and 4 apples cost Rs.15. 3 oranges, 2 bananas, and 1 apple costs Rs 10. What is the cost of 3 oranges, 3 bananas and 3 apples?

it can be 15 bcoz

2x+3y+4z=15

3x+2y+z=10

adding

5x+5y+5z=25

x+y+z=5 that is for 1 orange ,1 bannana and 1 apple requires 5Rs.

so for 3 orange ,3 bannana and 3 apple requires 15Rs.

i.e. 3x+3y+3z=15........

Is this answer helpful? 0 Yes | 0 No

Answer This Question

210 views

Aptitude

Home Basic Common Aptitude

332 Aptitude Questions And Answers

161⟩ Which one of the following has the highest standard deviation?a 1,0,1,0,1b 1,1,1,1,1c -1,-1,-1,-1,-1

162⟩ In a 60 liters of mixture of spirit and water is 7 %. In order to make water 19%, how much water should be added?

163⟩ Ten boxes are there. Each ball weighs 100 gms. One ball is weighing 90 gms. i) If there are 3 balls (n=3) in each box, how many times will it take to find 90 gms ball? ii) Same question with n=10 iii) Same question with n=9

164⟩ There are two square rooms. Both are of same height. The second room is 5m longer than the first room. The rate for papering the walls is 10 paisa per square meter. The total cost for papering the rooms is Rs 60 and Rs 80. What is the height of the rooms?

166⟩ What is 5x - x^2 = 0 ?

167⟩ What is the sum of all the four digit numbers formed using the digits 0, 1, 2 and 3. None of the two digits should be repeated?

168⟩ A tree grows only 3/5 as fast as the one beside it. In four years the combined growth of the two trees is eight feet.How much does the shorter tree grow in two years?(a) Less than 2 feet (b) 2feet (c) 2 1/2 feet(d) 3 feet (e) more than 3 feet.

169⟩ A 5 liter jug contains 4 liters of a salt water solution that is 15 percent salt. If 1.5 liters of the solution spills out of the jug, and the jug is then filled to capacity with water, approximately what percent of the resulting solution in the jug is salt?

170⟩ A work is done by the people in 24 min. One of them can do this work alone in 40 min. How much time required to do the same work for the second person?

171⟩ How do you calculate your production per 100 man hours? What is the formula? Cycle Time (CT) is 171 seconds per unit for 1 type of product made in that work center and CT is 307 seconds for another type of product made in that same work center?

172⟩ There are 4 balls and 4 boxes of colors yellow, pink, red and green. Red ball is in a box whose color is same as that of the ball in a yellow box. Red box has green ball. In which box you find the yellow ball?

173⟩ It cost a college Rs.0.70 a copy to produce a Program for the homecoming football game. If Rs.15,000/- was received for advertisements in the program, how many copies at Rs.0.50 a copy must be sold to make a profit of Rs.8000/- ?

174⟩ + means * and * means / and / means % what is the value of 2+3*5/7?

176⟩ There is a six digit code. Its first two digits, multiplied by 3 gives all ones. And the next two digits multiplied by 6 give all twos. Remaining two digits multiplied by 9 gives all threes. Then what is the code?

177⟩ If a factory manufactures 7200 bottles in 1 hour, how much does it manufactures in 1 second?a)120b)2C)1200d)60

178⟩ Falling height is proportional to square of the time. One object falls 64cm in 2sec than in 6sec from how much height the object will fall?

179⟩ Gavaskar average in first 50 innings was 50. After the 51st innings his average was 51 how many runs he made in the 51st innings?

180⟩ 2 oranges, 3 bananas and 4 apples cost Rs.15. 3 oranges, 2 bananas, and 1 apple costs Rs 10. What is the cost of 3 oranges, 3 bananas and 3 apples?

Quick Links:

Aptitude

Home Basic Common Aptitude

332 Aptitude Questions And Answers

161⟩ Which one of the following has the highest standard deviation?a 1,0,1,0,1b 1,1,1,1,1c -1,-1,-1,-1,-1

162⟩ In a 60 liters of mixture of spirit and water is 7 %. In order to make water 19%, how much water should be added?

163⟩ Ten boxes are there. Each ball weighs 100 gms. One ball is weighing 90 gms. i) If there are 3 balls (n=3) in each box, how many times will it take to find 90 gms ball? ii) Same question with n=10 iii) Same question with n=9

164⟩ There are two square rooms. Both are of same height. The second room is 5m longer than the first room. The rate for papering the walls is 10 paisa per square meter. The total cost for papering the rooms is Rs 60 and Rs 80. What is the height of the rooms?

166⟩ What is 5x - x^2 = 0 ?

167⟩ What is the sum of all the four digit numbers formed using the digits 0, 1, 2 and 3. None of the two digits should be repeated?

168⟩ A tree grows only 3/5 as fast as the one beside it. In four years the combined growth of the two trees is eight feet.How much does the shorter tree grow in two years?(a) Less than 2 feet (b) 2feet (c) 2 1/2 feet(d) 3 feet (e) more than 3 feet.

169⟩ A 5 liter jug contains 4 liters of a salt water solution that is 15 percent salt. If 1.5 liters of the solution spills out of the jug, and the jug is then filled to capacity with water, approximately what percent of the resulting solution in the jug is salt?

170⟩ A work is done by the people in 24 min. One of them can do this work alone in 40 min. How much time required to do the same work for the second person?

171⟩ How do you calculate your production per 100 man hours? What is the formula? Cycle Time (CT) is 171 seconds per unit for 1 type of product made in that work center and CT is 307 seconds for another type of product made in that same work center?

172⟩ There are 4 balls and 4 boxes of colors yellow, pink, red and green. Red ball is in a box whose color is same as that of the ball in a yellow box. Red box has green ball. In which box you find the yellow ball?

173⟩ It cost a college Rs.0.70 a copy to produce a Program for the homecoming football game. If Rs.15,000/- was received for advertisements in the program, how many copies at Rs.0.50 a copy must be sold to make a profit of Rs.8000/- ?

174⟩ + means * and * means / and / means % what is the value of 2+3*5/7?

176⟩ There is a six digit code. Its first two digits, multiplied by 3 gives all ones. And the next two digits multiplied by 6 give all twos. Remaining two digits multiplied by 9 gives all threes. Then what is the code?

177⟩ If a factory manufactures 7200 bottles in 1 hour, how much does it manufactures in 1 second?a)120b)2C)1200d)60

178⟩ Falling height is proportional to square of the time. One object falls 64cm in 2sec than in 6sec from how much height the object will fall?

179⟩ Gavaskar average in first 50 innings was 50. After the 51st innings his average was 51 how many runs he made in the 51st innings?

180⟩ 2 oranges, 3 bananas and 4 apples cost Rs.15. 3 oranges, 2 bananas, and 1 apple costs Rs 10. What is the cost of 3 oranges, 3 bananas and 3 apples?

BE THE FIRST TO KNOW

Quick Links: