Logical Reasoning

Sequence & Series

Hard

Which term will replace the question mark (?) in the alphanumeric series given below?

B1, E2, H6, K21, ?, Q445

N88

N86

O84

N90

✅ Correct Option: 1

Letters advance by 3: B, E, H, K, N, Q. So the missing letter is N.

Numbers follow $a_{n+1} = a_n \times n + n$ : $1\times1+1 = 2$ , $2\times2+2 = 6$ , $6\times3+3 = 21$ , $21\times4+4 = 88$ , $88\times5+5 = 445$ .

Hence the term is N88.

2022: 8 Aug Shift 1

Complete the series;

8192, 2048, ...?..., 128, 32, 8

2025: 22 May Shift 1

Select the term that will come next in the following series.

FBA, IGE, LLI, OQM, ?

2026: 22 May Shift 2

Find the next term in the alphanumeric series:

B7A, F8F, J11K, N16P, ?

2023: 5 June Shift 2

What number should replace the question mark ?

(A) 72 : 8

(B) 156 : 12

(D) 600 : ?

Choose the most appropriate answer from the options given below :

2025: 22 May Shift 1

Select the letter that can replace the question mark (?) in the following series.

A, E, I, ?, Q, U

2024

Find out the missing (?) number and letter.

Solution