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+ and - interchanged, x and divide interchanged: evaluate the expression

The same question, asked 2 times: 26 Oct 2023 Tier II*, 20 Jan 2025 Tier II. Every wording below, oldest first.

Try each one first, then open its answer.

  1. Question 1

    26 Oct 2023 Tier II

    49
    What will come in the place of the question mark (?) in the following equation if ‘+’ and ‘–’ are interchanged and ‘×\times’and ‘÷\div’ are interchanged? 161÷4+75×5−4=?161 \div 4 + 75 \times 5 - 4 = ?

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  2. Question 2

    26 Oct 2023 Tier II

    43
    What will come in the place of the question mark (?) in the following equation if ‘+’ and ‘–’ are interchanged and ‘×\times’and ‘÷\div’ are interchanged? 113÷4−217×7+4=?113 \div 4 - 217 \times 7 + 4 = ?

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  3. Question 3

    26 Oct 2023 Tier II

    40
    What will come in the place of the question mark (?) in the following equation if ‘+’ and ‘–’ are interchanged and ‘×\times’and ‘÷\div’ are interchanged? 163÷3+147×7−1=?163 \div 3 + 147 \times 7 - 1 = ?

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  4. Question 4

    20 Jan 2025 Tier II

    50
    What will come in the place of the question mark (?) in the following equation, if ‘+’ and ‘−-’ are interchanged and ‘×\times’ and ‘÷\div’ are interchanged? 98÷7+288×2−144×3−152÷2+120=?98 \div 7 + 288 \times 2 - 144 \times 3 - 152 \div 2 + 120 = ?

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