Top 1000+ Quantitative Aptitude Questions with Answers - 2

Ans: B

Go on divisible by 4 to get the next number.

So 200 is wrong.

Ans: D

2nd term = (1st term) x 1 + 1 = 15 x 1 + 1 = 16;

3rd term = (2nd term) x 2 + 2 = 16 x 2 + 2 = 34;

4th term = (3rd term) x 3 + 3 = 34 x 3 + 3 = 105;

5th term = (4th term) x 4 + 4 = 105 x 4 + 4 = 424;

6th term = (5th term) x 5 + 6 = 425 x 5 + 5 = 2125.

Therefore, 6th term should be 2125 instead of 2124.

Ans: B

2nd term = 1st term – (12)² = 789 – 144 = 645;

3rd term = 2nd term – (10)² = 645 – 100 = 545;

4th term = 3rd term – (8)² = 545 – 64 = 481;

5th term = 4th term – (6)² = 481 – 36 = 445.

Therefore, 440 is wrong.

Ans: D

Go on adding 7, 9, 11, 13, 15, 17, 19 respectively to obtain the next number.

So, 135 is wrong.

Ans: A

2^nd term = (1^st term x 1 + 2) = (4 x 1 + 2) = 6;

3^rd term = (2^nd term x 2 + 3) = (6 x 2 + 3) = 15;

4^th term = (3^rd term x 3 + 4) = (15 x 3 + 4) = 49;

5^th term = (4^th term x 4 + 5) = (49 x 4 + 5) = 210 and so on.

Therefore, 5 is wrong.