Simplification Test 5

Question : 11 of 40

Marks: +1, -0

Which of the following will come in place of both the question marks in the following equation?

{128÷16×?-7×2}/{7^2-8×6+?^2}=1

Solution:

{128÷16×?-7×2}/{7^2-8×6+?^2}=1

={8×?-7×2}/{1+?^2}=1

⇒8? - ?^2 = 14 + 1

⇒?(8-?)=15

By putting ? = 3, we get, 3 (8 – 3) = 15
Hence, ? = 3

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