Which two signs and two numbers should be interchanged to make the given equation correct?
16 + 8 × 25 – 15 ÷ 5 = 138
Show answer & explanation
Correct answer: A
Explanation
The correct answer is option 1 i.e × and +; 15 and 25.
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Given expression: 16 + 8 × 25 – 15 ÷ 5 = 138 Check the options: Option 1: × and +; 15 and 25 After replacement the equation becomes; =16 × 8 + 15 – 25 ÷ 5 =16 × 8 + 15 – 5 =128 + 15 – 5 =143 – 5 =138 Hence, option 1 is the correct answer. |
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Option 2: ÷ and -; 15 and 5 After replacement the equation becomes; =16 + 8 × 25 ÷ 5 – 15 =41 Hence, option 2 is not the correct answer. |
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Option 3: × and -; 8 and 25 After replacement the equation becomes; = 16 + 25 – 8 × 15 ÷ 5 = 36 Hence, option 3 is not the correct answer. |
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Option 4: × and +; 8 and 25 After replacement the equation becomes; = 16 × 25 + 8 – 15 ÷ 5 = 405 Hence, option 4 is not the correct answer. |