Question 39

The following equation is incorrect. Which two signs should be interchanged to correct the equation?
$$90 \div 10 + 5- 6 \times 4 = 28$$

Solution

Expression : 90 ÷ 10 + 5- 6 x 4 = 28

(A) : - and +

$$\equiv90\div10-5+6\times4=28$$

L.H.S. = $$(\frac{90}{10})-5+(6\times4)$$

= $$9-5+24=28=$$ R.H.S.

=> Ans - (A)

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The following equation is incorrect. Which two signs should be interchanged to correct the equation?$$90 \div 10 + 5- 6 \times 4 = 28$$