Inversion Problems (Finding the Number Given the Result)
Antoinette is...
Question
Antoinette is given a problem to solve, but the operations have been changed. Follow the given table, and help Antoinette solve the problem given below.
Problem: [9 + (5 > 7)] × [(5 + 2) > 8]
A
78
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B
18
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C
108
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D
90
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Solution
The correct option is D 90 The given table is:
The actual problem is: [9 + (5 > 7)] × [(5 + 2) > 8]
By following the above table and replacing + with ×, > with +, and × with −, we get: [9 × (5 + 7)] − [(5 × 2) + 8]