Number Series Quiz | Quantitative Aptitude MCQ Practice for IBPS AFO 2026

1

1296,652,328,169,88.5,48.25 – Find the wrong number

Solution & Explanation Pattern: ÷2+4. 652 ÷ 2 + 4 = 330. 328 is wrong.

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2

209, 334, 1334, 4709, ?, 28334, 55334 – Find the missing term in the series

Solution & Explanation Pattern: +5³, +10³, +15³, +20³, +25³, +30³. 4709+8000=12709.

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3

Find the wrong term in the following number series: 84, 96, 83, 95, 80, 94, 81

Solution & Explanation Pattern: +12, -13. 95 - 13 = 82 (not 80).

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4

7924,8653,9653,10984,12712,? – Find the missing number

Solution & Explanation Pattern: +9³, +10³, +11³, +12³, +13³. 12712+2197 = 14909.

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5

In the following number series, one number is wrong. Find the wrong number. 5, 27, 61, 122, 213, 340, 509

Solution & Explanation The pattern is n³ − 3: 2³−3=5, 3³−3=24, 4³−3=61, 5³−3=122, 6³−3=213, 7³−3=340, 8³−3=509. Hence, 27 is the wrong number and should be 24.

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Number Series Quiz for IBPS AFO 2026

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