Q:

The 2nd and 6th term of an arithmetic progression are 8 and 20 respectively. What is the 20th term?

A) 56 B) 65
C) 62 D) 69
 
Answer & Explanation Answer: C) 62

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0 1235
Q:

By which least number should 5000 be divided so that it becomes a perfect square?

A) 2 B) 5
C) 10 D) 15
 
Answer & Explanation Answer: A) 2

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1 1232
Q:

Which one of the following is an irrational number?

A) √59059 B) 231/593
C) 0.454545.... D) 0.121122111222
 
Answer & Explanation Answer: D) 0.121122111222

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0 1231
Q:

How many numbers divisible by 125 can be written by using all the digits 2,3,8,7,5 exactly once?

A) 4 B) 5
C) 6 D) 7
 
Answer & Explanation Answer: A) 4

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0 1216
Q:

What least number must be subtracted from 518, so that the sum is completely divisible by 13?

A) 11 B) 10
C) 9 D) 12
 
Answer & Explanation Answer: A) 11

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1 1206
Q:

What will be the next set of numbers in the series? (2,3), (3,5), (5,7), (7,11), (11,13), ___

A) 13,15 B) 15,17
C) 13,17 D) 13,19
 
Answer & Explanation Answer: C) 13,17

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0 1195
Q:

Given that the polynomial (x2+ ax+ b) leaves that same remainder when by (x –1) or (x + 1) What are the values of a and b respectively?

A) 4 and 0 B) 0 and 3
C) 3 and 0 D)  0 and any interger
 
Answer & Explanation Answer: D)  0 and any interger

Explanation:

Since x^2+ ax + b when divided by x-1 or x+1 leaves the same remainder

So on putting x=1 and x=-1 we get the same value

1+a+b = 1-a+b

2a=0

a=0

here b can take any value as it will always get cancelled out

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0 1194
Q:

What should be the missing digit so that the number 275_476 becomes exactly divisible by 11?

A) 6 B) 4
C) 2 D) 3
 
Answer & Explanation Answer: D) 3

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1 1193