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Mathematical Operations

SSC CGL Reasoning. Try each one first, then open its answer.

Top 10 SSC CGL PYQs to practise first

The questions and kinds of question asked most often come first. Each one says how often and in which papers.

  1. Question 1

    This type asked 38 times: 23 in 2023, 5 in 2024, 10 in 2025. This one: 26 Sep 2025 S1 See all 38 of this type

    5
    Which two signs should be swapped to correct this equation? 20÷5+6×2−4=1820 \div 5 + 6 \times 2 - 4 = 18

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  2. Question 2

    This type asked 33 times: 32 in 2024, 1 in 2025. This one: 22 Sep 2025 S1 See all 33 of this type

    20
    Given below is an equation which has to be solved by following the interchange i.e., + becomes −- and −- becomes + ×\times becomes ÷\div and ÷\div becomes ×\times Then what is the value of 100 ÷\div 5 + 20 −- 10 ×\times 2 = ?

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  3. Question 3

    This type asked 30 times: 8 in 2023, 1 in 2024, 21 in 2025. This one: 24 Sep 2025 S2 See all 30 of this type

    21
    If + = ×\times, - = ÷\div, ×\times = -, ÷\div = +; 6 + 2 - 4 ×\times 2 ÷\div 1 = ?

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  4. Question 4

    This type asked 20 times: 20 in 2023. This one: 27 Jul 2023 S3 See all 20 of this type

    18
    Select the correct combination of mathematical signs to sequentially replace the * signs and balance the given equation. 7 * 5 * 4 * 2 * 3 * 7

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  5. Question 5

    This type asked 14 times: 25 Jul 2023 S2, 27 Jul 2023 S2, 12 Sep 2025 S1, 13 Sep 2025 S2, 15 Sep 2025 S1, 16 Sep 2025 S1, 16 Sep 2025 S3, 17 Sep 2025 S2, 17 Sep 2025 S3, 19 Sep 2025 S3, 22 Sep 2025 S1, 22 Sep 2025 S3, 23 Sep 2025 S1, 23 Sep 2025 S3. This one: 23 Sep 2025 S3 See all 14 of this type

    20
    If @ = -, % = ×\times, # = +; then 10 % 2 @ 4 # 3 = ?

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  6. Question 6

    This type asked 13 times: 14 Jul 2023 S1, 17 Jul 2023 S3, 18 Jul 2023 S2, 19 Jul 2023 S1, 20 Jul 2023 S1, 21 Jul 2023 S1, 21 Jul 2023 S2, 19 Sep 2024 S2, 25 Sep 2024 S1, 18 Sep 2025 S2, 21 Sep 2025 S1, 21 Sep 2025 S3, 24 Sep 2025 S1. This one: 24 Sep 2025 S1 See all 13 of this type

    7
    Replace special characters with mathematical signs as given in options to make it meaningful equation. 8 & 2 $ 3 = 14

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  7. Question 7

    This type asked 13 times: 18 Jul 2023 S4, 19 Jul 2023 S2, 19 Jul 2023 S3, 19 Jul 2023 S4, 21 Jul 2023 S2, 21 Jul 2023 S3, 24 Jul 2023 S1, 24 Jul 2023 S4, 25 Jul 2023 S1, 25 Jul 2023 S3, 26 Jul 2023 S1, 26 Jul 2023 S3, 22 Sep 2025 S3. This one: 22 Sep 2025 S3 See all 13 of this type

    17
    Which interchanges of numbers and signs will make the equation correct? 7+3×4=197 + 3 \times 4 = 19

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  8. Question 8

    This type asked 11 times: 14 Sep 2025 S2, 15 Sep 2025 S2, 16 Sep 2025 S1, 16 Sep 2025 S2, 16 Sep 2025 S3, 17 Sep 2025 S2, 18 Sep 2025 S2, 19 Sep 2025 S3, 20 Sep 2025 S1, 21 Sep 2025 S1, 22 Sep 2025 S1. This one: 22 Sep 2025 S1 See all 11 of this type

    18
    If the signs are interchanged as follows: - '+' means '×\times' - '−-' means '÷\div' - '×\times' means '+' - '÷\div' means '−-' Choose the correct equation from the options below.

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  9. Question 9

    This type asked 9 times: 10 Sep 2024 S3, 11 Sep 2024 S2, 13 Sep 2024 S3, 17 Sep 2024 S1, 18 Sep 2024 S1, 19 Sep 2024 S2, 25 Sep 2024 S3, 26 Sep 2024 S2, 26 Sep 2024 S3. This one: 26 Sep 2024 S3 See all 9 of this type

    5
    What will come in the place of the question mark (?) in the following equation if ‘++’ and ‘×\times’ are interchanged and ‘−-’ and ‘÷\div’ are interchanged? 95−19×4+6÷16=?95 - 19 \times 4 + 6 \div 16 = ?

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  10. Question 10

    This type asked 9 times: 24 Jul 2023 S4, 9 Sep 2024 S3, 10 Sep 2024 S2, 11 Sep 2024 S1, 12 Sep 2024 S3, 13 Sep 2024 S1, 18 Sep 2024 S3, 23 Sep 2024 S3, 25 Sep 2024 S2. This one: 25 Sep 2024 S2 See all 9 of this type

    22
    Which two numbers (not digits) should be interchanged to make the given equation correct? 15+5×8−72÷4+16×3=10115 + 5 \times 8 - 72 \div 4 + 16 \times 3 = 101

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