Question : Directions: Which two signs should be interchanged to make the given equation correct?
60 × 4 + 9 ÷ 3 – 8 = 34
Option 1: + and –
Option 2: ÷ and +
Option 3: + and ×
Option 4: ÷ and ×
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Correct Answer: ÷ and ×
Solution :
Given:
60 × 4 + 9 ÷ 3 – 8 = 34
Replace the given symbols in the options one by one with the original symbols in the given equation
–
First option:
+ and –
= 60 × 4 – 9 ÷ 3 + 8
= 60 × 4 – 3 + 8
= 240 – 3 + 8
= 248 – 3
= 245 ≠ 34
Second option:
÷ and +
= 60 × 4 ÷ 9 + 3 – 8
= 60 × 0.44 + 3 – 8
= 26.4 + 3 – 8
= 29.4 – 8
= 21.4 ≠ 34
Third option:
+ and ×
= 60 + 4 × 9 ÷ 3 – 8
= 60 + 4 × 3 – 8
= 60 + 12 – 8
= 72 – 8
= 64 ≠ 34
Fourth option:
÷ and ×
= 60 ÷ 4 + 9 × 3 – 8
= 15 + 9 × 3 – 8
= 15 + 27 – 8
= 42 – 8
= 34
So, only the fourth option satisfies the R.H.S. of the given equation. Hence, the fourth option is correct.
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