Practice30 Create account

Which number comes next: 1, 2, 6, 21, 88, ?

Competition practiceNumber Series

A445
B440
C450
D352

Step-by-Step Solution

The rule is ×

n + n

for

n = 1

, 2, 3, …:

1 \times 1 + 1 = 2, 2 \times 2 + 2 = 6, 6 \times 3 + 3 = 21, 21 \times 4 + 4 = 88

, so

88 \times 5 + 5 = 445

.

Answer: A) 445

Master this topic in 30 minutes a day.

Don't just memorise the answer — build a daily practice habit.

Practice 5 Similar Questions Free →

All Number Series practice questions

More Number Series practice

Which number continues 25, 49, 121, 169, ... ?Exactly one number in 0, 3, 8, 15, 24, 36, 48 breaks the pattern. Which one?Which term is wrong in 2, 6, 18, 56, 162, 486?The series 8, 27, 64, 125, 216, 344, 512 contains one wrong term. Find it.Which term breaks the pattern in 2, 5, 14, 41, 123, 365?