Which of the following numbers will replace the question mark in the given series 90 211 67 236 ........

Logical Reasoning (CPO) Number series

Which of the following numbers will replace the question mark (?) in the given series?

90, 211, 67, 236, ?

This questions was previously asked in

SSC CPO 11th Nov 2022 Shift 2

143

- The given series alternates between decreasing and increasing numbers: 90 to 211, 211 to 67, 67 to 236.

- From 90 to 211, the increase is by 121.

- From 211 to 67, the decrease is by 144.

- From 67 to 236, the increase is 169.

- Let's look at the pattern: the series has increasing squares of consecutive numbers:

- 11² = 121

- 12² = 144

- 13² = 169

- The next change should decrease by 14² = 196, since we follow an alternating up-down pattern.

- Subtracting from 236 by 196 gives us 40.

- Option 3: 40

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