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Question

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

589, 588, 583, ?, 433, -192

This question was previously asked in
HTET 2025 Level 1 PRT Question Paper (5-Jul-2026)
The correct answer is

558

Find the differences between consecutive terms: \(589 - 588 = 1\) and \(588 - 583 = 5\).

Check the last known difference: \(433 - (-192) = 625\). Since \(1 = 5^0\), \(5 = 5^1\) and \(625 = 5^4\), the differences follow powers of 5: 1, 5, 25, 125, 625.

So the missing term satisfies \(583 - x = 25\), giving \(x = 558\).

Verifying with the next difference: \(558 - 433 = 125\), which matches the expected pattern, confirming the missing number is 558.

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Similar Questions

  1. Which of the following numbers will replace the question mark (?) in the given series?
    11, 13, 29, 91, 369, ?

  2. Study the given pattern carefully and select the number that can replace the question mark (?) in it.

    811
    765
    486372

Important Questions from Number Series

  1. What will come in place of question mark (?) in the following number series?

    2, 5, 11, 23, 44, 77, ?

  2. What will come in place of question mark (?) in the following number series?

    31, 32, 36, ?, 61, 86

  3. What will come in the place of question mark (?) in the following number series?

    3, 6, 18, ?, 630, 6930

  4. What should come in place of the question mark ‘?’ in the following number series?

    60, 40, 50, ?, 180, 460

  5. A series is given with one term wrong. Select that wrong term from the given alternatives.

    J12, M24, P48, S96, U192

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