Amol was asked to calculate the arithmetic mean of ten positive integers each of which had two digits. By mistake, he interchanged the into digits say (a) and (b) in one of these ten integers. As a result, his answer for the arithmetic mean was 1.8 more than what it should have been. Then b-a equals :

1.  1

2.  2

3.  3

4.  none of these

View Answer  
4
Correct Answer :

2


Explanation :
No Explanation available for this question

ABCDEFGH is a regular octagon. A and E are opposite vertices of the octagon. A frog starts jumping from vertex to vertex, beginning from A. From any vertex of the octagon except E, it may jump to either of the two adjacent vertices. When it reaches E, the frog stops and stays there. Let an be the number of distinct paths of exactly n jumps ending in E. Then, what is the value of a2n-1

1.  Zero

2.  Four

3.  2n-1

4.  Cannot be determined

View Answer  
4
Correct Answer :

Zero


Explanation :
No Explanation available for this question

At a bookstore, "MODERN BOOK STORE" is flashed using neon lights. The words are individually flashed at intervals of 2 1/2, 4 1/4, 5 1/8 seconds respectively, and each word is put off after a second. The least time after which the full name of the bookstore can be read again is:

1.  49.5 seconds

2.  73.5 seconds

3.  1744.5 seconds

4.  855 seconds

View Answer  
4
Correct Answer :

73.5 seconds


Explanation :
No Explanation available for this question

If R = (3065-2965)/(3064+2964) then :

1.  0 < R ≤ 0.1

2.  0.1 < R ≤ 0.5

3.  0.5 < R ≤ 1.0

4.  R > 1.0

View Answer  
4
Correct Answer :

R > 1.0


Explanation :
No Explanation available for this question

A truck travelling at 70 kilometres per hour uses 30% more diesel to travel a certain distance than it does when it travels at the speed of 50 kilometres per hour. If the truck can travel 19.5 kilometres on a litre of diesel at 50 kilometres per hour, how far can the truck travel on 10 litres of diesel at a speed of 70 kilometres per hour

1.  130

2.  140

3.  150

4.  175

View Answer  
4
Correct Answer :

150


Explanation :
No Explanation available for this question

The owner of a local jewellery store hired 3 watchmen to guard his diamonds, but a thief still got in and stole some diamonds. On the way out, the thief met each watchman, one at time. To each he gave 1/2 of the diamonds he had then, and 2 more besides. He escaped with one diamond. How many did he steal originally

1.  40

2.  36

3.  25

4.  none of these

View Answer  
4
Correct Answer :

36


Explanation :
No Explanation available for this question

Mayank, Mirza, Little and Jaspal bought a motorbike for $60.00. Mayank paid one half of the sum of the amounts paid by the other boys, Mirza paid one third of the sum of the amounts paid by the other boys; and Little paid one fourth of the sum of the amounts paid by the other boys. How much did Jaspal have to pay

1.  15

2.  13

3.  17

4.  none of these

View Answer  
4
Correct Answer :

13


Explanation :
No Explanation available for this question

Let N = 553 + 173 - 723. N is divisible by:

1.  both 7 and 13

2.  both 3 and 13

3.  both 17 and 7

4.  both 3 and 17

View Answer  
4
Correct Answer :

both 3 and 17


Explanation :
No Explanation available for this question

A rich merchant had collected many gold coins. He did not want anybody to know about them. One day, his wife asked, "How many gold coins do we have" After pausing a moment, he replied, "Well! If I divide the coins into two unequal numbers, then 48 times the difference between the two numbers equals the difference between the squares of the two numbers." The wife looked puzzled. Can you help the merchant's wife by finding out how many gold coins the merchant has?

1.  96

2.  53

3.  43

4.  none of these

View Answer  
4
Correct Answer :

none of these


Explanation :
No Explanation available for this question

For which Value of k does the following pair of equations yield a unique solution for x such that the solution is positivex2 - y2 = 0 (x -  k)2 + y2 = 1.

1.  2

2.  0

3.  √2

4.  -√2

View Answer  
4
Correct Answer :

√2


Explanation :
No Explanation available for this question
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