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Problem-Solving By Substitution

Interchange Of Signs And Numbers

A. 25

B. 27

C. 29

D. 31

E. None of the above

Answer: B. 27

Using BODMAS, first perform multiplication: 2 ? 4 = 8. Then, substitute: 5 ? 3 = 8, and finally 8 ? 8 = 27.

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