Top 10,000+ Aptitude Questions and Answers Pdf - 2

Ans: B

Each number is twice the preceding one with 1 added or subtracted alternately.

So, the next number is ( 2 x 261 + 1) = 523.

Ans: A

Each previous number is multiplied by 2.

Ans: C

Second number is one more than twice the first;

the third number is one less than twice the second;

fourth number is one more than twice the third;

fifth number is one less than the fourth.

Therefore, the sixth number is one more than twice the fifth.

So, the missing number is 75.

Ans: B

Numbers are alternately multiplied by 2 and increased by 3.

So, the missing number = 61 x 2 = 122.

Ans: A

There are two series, beginning respectively with 3 and 7.

In one 3 is added and in another 2 is subtracted.

The next number is 1 – 2 = - 1.