Question 39

The following equation is incorrect. Which two signs should be interchanged to correct the equation?
18 + 26 - 25 x 10 ÷ 5 = 42

Solution

Expression : 18 + 26 - 25 x 10 ÷ 5 = 42

(A) : - and +

$$\equiv18-26+25\times10\div5=42$$

L.H.S. = $$-8+25\times2$$

= $$-8+50=42=$$ R.H.S.

=> Ans - (A)

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The following equation is incorrect. Which two signs should be interchanged to correct the equation?18 + 26 - 25 x 10 ÷ 5 = 42