number series Model Questions & Answers, Practice Test for ibps rrb po prelims

Answer: (a)

The numerical parts moves with a difference of + 4.

Thus, the correct sequence of the numerical components would be 1, 5, 9, 13, 17 Therefore, 15 LS does not fit in the series.

Answer: (d)

There are two series :

I. B0R E3P H9N

First letter moves + 3 steps forward. The middle numerical component moves + 3, + 6, + 9 ........... and the letter in the third position moves 2 steps backwards (– 2).

II. G3U, J7S

The same pattern follows in this series.

Hence, J7S does not fit.

Answer: (d)

The given sequence is a combination of two series :

I. 11, 21, 32, 41, 51 and II. 2, 3, 4, 5, 6

Clearly, the pattern in I is +10

So, 32 is wrong and should be replaced by (21 + 10) i.e. 31.

Answer: (d)

The sequence is –11, +9, –7, +5, –3, +1

So, 86 is wrong and should be replaced by (78 + 9) i.e. 87.

Answer: (a)

Differences between two consecutive terms are 2, 3, 4, 5 and 6 respectively.