IBPS PO 2018 · Question 58 of 98

In the following series one number is wrong, find out the wrong number. 5, 4, 7, 20, 79, 395, 2363

Number Series (Wrong Number)

A4
B7
C79
D395Correct
E2363

Answer: D. 395

Explanation

The pattern is as follows: ⇒ 5 × 1 − 1 = 4; ⇒ 4 × 2 − 1 = 7; ⇒ 7 × 3 − 1 = 20; ⇒ 20 × 4 − 1 = 79; ⇒ 79 × 5 − 1 = 394; ⇒ 394 × 6 − 1 = 2373. ∴ 395 is wrong and should be replaced by 394.

Source: IBPS PO 2018 Prelims Memory-Based Test 13-Oct-2018 Shift 1 (Prepp) · memory-based

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