Select the number from among the given options that can replace the question mark (?) in the following series
1, 2, 6, 21, ?, 445
Show answer & explanation
Correct answer: A
Explanation
The correct answer is Option 1 i.e. 88.
Given series: 1, 2, 6, 21, ?, 445
The series follows this pattern:
1 × 1 + 1 = 2
2 × 2 + 2 = 6
6 × 3 + 3 = 21
21 × 4 + 4 = 88
88 × 5 + 5 = 445
So the missing term is 88