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Question : Directions: Select the number that can replace the question mark (?) in the following series.
1, 1, 2, 3, 7, 22, ?

Option 1: 157

Option 2: 156

Option 3: 155

Option 4: 152


Team Careers360 19th Jan, 2024
Answer (1)
Team Careers360 21st Jan, 2024

Correct Answer: 155


Solution : Given:
1, 1, 2, 3, 7, 22, ?

Multiply the first two terms and then add 1 to obtain the third term and follow the same pattern for the next term.
(1 × 1) + 1 = 2; (1 × 2) + 1 = 3; (2 × 3) + 1 = 7; (3 × 7) + 1 = 22; (7 × 22) + 1 = 155

So, 155 is the required term in the given series. Hence, the third option is correct.

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