Question 39
The following equation is incorrect. Which two signs should be interchanged to correct the equation?
16 ÷ 6 + 35 x 9 - 15 = 31
Solution
Expression : 16 ÷ 6 + 35 x 9 - 15 = 31
(A) : + and x
L.H.S. = $$16\div6\times35+9-15$$
= $$93.33-6=87.33\neq$$ R.H.S.
(B) : - and ÷
L.H.S. = $$16-6+35\times9\div15$$
= $$10+(7\times3)=31=$$ R.H.S.
=> Ans - (B)
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