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In each of the following questions, if the given interchanges are made in sign & numbers which one of the four equations would be correct?
Given interchanges: Sings $+ & \times$ , Number 4 & 5

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$5 \times 4 + 20 = 40$

$4 + 20 \times 5 = 104$

$5 \times 4 + 20 = 85$

$5 \times 4 + 20 = 95$

answer is B.

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Detailed Solution

$4 + 5 \times 20 = 104$

$\Rightarrow 100 + 4 = 104$

$\Rightarrow 104 = 104$

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