Which two mathematical signs should be interchanged to make the given equation correct?
(63 × 21) + 8 + 99 × 11 ÷ 16 + (12 × 4) = 158
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. ÷ and ×.
Given Equation : (63 × 21) + 8 + 99 × 11 ÷ 16 + (12 × 4) = 158
Interchanging the signs given in option 4 the equation becomes :
(63 ÷ 21) + 8 + 99 ÷ 11 x 16 + ( 12 ÷ 4 ) = 158
3 + 8 + 99 ÷ 11 x 16 + 3 = 158
3 + 8 + 9 x 16 + 3 = 158
3 + 8 + 144 +3 = 158
158 = 158
Thus , LHS = RHS the equation is satisfied.
Hence , ÷ and × is the correct answer.