Question 18
Which of the following interchanges in signs and numbers will make the given equation correct?
7 x 9 + 5 = 68
Solution
Equation : 7 x 9 + 5 = 68
(A) : + and =, 5 and 6
$$\equiv7\times9=6+58$$
=> L.H.S. $$=63\neq64=$$ R.H.S.
(B) : x and +, 5 and 7
$$\equiv5+9\times7=68$$
=> L.H.S. $$=5+63=68=$$ R.H.S.
=> Ans - (B)
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