If the sum of the first 11 terms of an arithmetic progression equals that of the first 19 terms, then what is the sum of the first 30 terms

1.  0

2.  -1

3.  1

4.  Not unique

View Answer  
4
Correct Answer :

-1


Explanation :
No Explanation available for this question

Consider the sequence of numbers a1, a3, a3, ..... to infinity where a1= 81.33 and a2= -19 and aj= aj-1-aj-2for j ≥ 3.What is the sum of the first 6002 terms of this sequence

1.  -100.33

2.  -30

3.  62.33

4.  119.33

View Answer  
4
Correct Answer :

62.33


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 :

170 minutes


Explanation :
No Explanation available for this question

Karan and Arjun run a 100-metre race, where Karan beats Arjun by 10 metres. To do a favour to Arjun, Karan starts 10 metres behind the starting line in a second 100-metre race. They both run at their earlier speeds. Which of the following is true in connection with the second race

1.  Karan and Arjun reach the finishing line simultaneously.

2.  Arjun beats Karan by 1 metre.

3.  Arjun beats Karan by 11 metre.

4.  Karan beats Arjun by 1 metre.

View Answer  
4
Correct Answer :

Karan beats Arjun by 1 metre.


Explanation :
No Explanation available for this question

If a man cycles at 10 km/hr, then he arrives at a certain place at 1 p.m. If he cycles at 15 km/hr, he will arrive at the same place at 11 a.m. At what speed must he cycle to get there at noon

1.  11 km/hr

2.  12 km/hr

3.  13 km/hr

4.  14 km/hr

View Answer  
4
Correct Answer :

12 km/hr


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 sprinter starts running on a circular path of radius r metres. Her average speed (in metres/minute) is πr during the first 30 seconds, πr/2 during next one minute, πr/4 during next 2 minutes, πr/8 during next 4 minutes, and so on. What is the ratio of the time taken for the nth round to that for the previous round

1.  1:4

2.  1:8

3.  1:16

4.  1:18

View Answer  
4
Correct Answer :

1:16


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

The remainder, when (1523 + 2323) is divided by 19, is

1.  4

2.  15

3.  0

4.  18

View Answer  
4
Correct Answer :

0


Explanation :
No Explanation available for this question

Four small discs of radius 5 cm. each have been cut out from a circular disc of radius 20 cm. What is the ratio of the area left out to the area cut out

1.  3:1

2.  4:1

3.  1:1

4.  2.1

View Answer  
4
Correct Answer :

3:1


Explanation :
No Explanation available for this question
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