Question

What will come at the place of question mark? 1, 2, 6, 21, 88, ?

• A. 445
• B. 441
• C. 443
• D. 440

Answer 1

Answer:

A. 445

Consider the series:

$1,2,6,21,88,?$

Look for the pattern:

• $(1 \times 1 + 1 = 2)$

• $(2 \times 2 + 2 = 6)$

• $(6 \times 3 + 3 = 21)$

• $(21 \times 4 + 4 = 88)$

So the rule is:

$\text{Next term} = (\text{Current term} \times n) + n,$

where $(n = 1, 2, 3, 4, \ldots)$

For the next term ((n=5)):

$88 \times 5 + 5 = 440 + 5 = 445$