Question : Direction: In the following question, which of the following interchange of signs would make the given equation correct?
(8 – 8) + 8 × 32 = 64
Option 1: ×, +, –
Option 2: –, ÷, +
Option 3: +, ÷, +
Option 4: +, ÷, ×
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Correct Answer: +, ÷, ×
Solution :
Given:
(8 – 8) + 8 × 32 = 64
Let's check the options —
First option:
×, +, –
On replacing →
(8 × 8) + 8 – 32 = 64
= (8 × 8) + 8 – 32
= 64 + 8 – 32
= 72 – 32
= 40 ≠ 64
Second option:
–, ÷, +
On replacing → (8 – 8) ÷ 8 + 32 = 64
= (8 – 8) ÷ 8 + 32
= 0 ÷ 8 + 32
= 0 + 32
= 32 ≠ 64
Third option:
+, ÷, +
On replacing → (8 + 8) ÷ 8 + 32 = 64
= (8 + 8) ÷ 8 + 32
= 16 ÷ 8 + 32
= 2 + 32
= 34 ≠ 64
Fourth option:
+, ÷, ×
On replacing → (8 + 8) ÷ 8 × 32 = 64
= (8 + 8) ÷ 8 × 32
= 16 ÷ 8 × 32
= 2 × 32
= 64
Hence, the fourth option is correct.
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