Thirty men take 20 days to complete a job working 9 hours a day. How many hour a day should 40 men work to complete the job

1.  8 hrs

2.  71/2 hrs

3.  7 hrs

4.  9 hrs

View Answer  
4
Correct Answer :

71/2 hrs


Explanation :
No Explanation available for this question

Two boats, traveling at 5 and 10 kms per hour, head directly towards each other. They begin at a distance of 20 kms from each other. How far apart are they (in kms) one minute before they collide

1.  1/12

2.  1/6

3.  1/4

4.  1/3

View Answer  
4
Correct Answer :

1/4


Explanation :
No Explanation available for this question

A and B can do a piece of work in 45 days and 40 days respectively. They began to do the work together but A leaves after some days and then B completed the remaining work n 23 days. The number of days after which A left the work was

1.  9

2.  11

3.  12

4.  15

5.  16

View Answer  
5
Correct Answer :

9


Explanation :
No Explanation available for this question

Suppose n is an integer such that the sum of the digits of n is 2, and 1010 < n < 1011. The number of different values for n is

1.  11

2.  10

3.  9

4.  8

View Answer  
4
Correct Answer :

11


Explanation :
No Explanation available for this question

Sam and Mala have a conversation. Sam says I am certainly not over 40 Mala Says I am 38 and you are at least 5 years older than me · Now Sam says you are at least 39 all the statements by the two are false. How old are they really

1.  Mala = 38 yrs, Sam =31 yrs.

2.  Mala = 38 yrs, Sam = 41 yrs

3.  Mala = 31 yrs, Sam = 41 yrs.

4.  Mala = 45yrs, Sam = 41 yrs

View Answer  
4
Correct Answer :

Mala = 38 yrs, Sam = 41 yrs


Explanation :
No Explanation available for this question

In Nuts And Bolts factory, one machine produces only nuts at the rate of 100 nuts per minute and needs to be cleaned for 5 minutes after production of every 1000 nuts. Another machine produces only bolts at the rate of 75 bolts per minute and needs to be cleaned for 10 minutes after production of every 1500 bolts. If both the machines start production at the same time, what is the minimum duration required for producing 9000 pairs of nuts and bolts

1.  130 minutes

2.  135 minutes

3.  170 minutes

4.  180 minutes

View Answer  
4
Correct Answer :

Explanation :
No Explanation available for this question

On sports day, if 30 children were made to stand in a column, 16 columns could be formed. If 24 children were made to stand in a column, how many columns could be formed

1.  20

2.  30

3.  40

4.  50

View Answer  
4
Correct Answer :

20


Explanation :
No Explanation available for this question

A father and his son are waiting at a bus stop in the evening. There is a lamp post behind them. The lamp post, the father and his son stand on the same straight line. The father observes that the shadows of his head and his son's head are incident at the same point on the ground. If the heights of the lamp post, the father and his son are 6 metres, 1.8 metres and 0.9 metres respectively, and the father is standing 2.1 metres away from the post, then how far (in metres) is the son standing from his father

1.  0.9

2.  0.75

3.  0.6

4.  0.45

View Answer  
4
Correct Answer :

0.9


Explanation :
No Explanation available for this question

 

1.  1/2

2.  –1

3.  1/2 or –1

4.    –1/2 or –1

View Answer  
4
Correct Answer :

1/2 or –1


Explanation :
No Explanation available for this question

The probability that a man will be alive for 25 years is 3/5 and the probability that his wife will be alive for 25 years is 2/3. Find the probability that only the man will be alive for 25 years.

1.  2/5

2.  1/5

3.  3/5

4.  4/5

View Answer  
4
Correct Answer :

1/5


Explanation :
No Explanation available for this question
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