Which number will come in the place of the question mark (?) in the following equation if ‘+’ and ‘−’ are interchanged and ‘×’ and ‘÷’ are interchanged? 7 ÷ 5 − 30 × 6 + 4 = ?
36
Original expression:
7 ÷ 5 − 30 × 6 + 4
Replace:
÷ with ×
− with +
× with ÷
+ with −
So the expression becomes:
7 × 5 + 30 ÷ 6 − 4
=35+5-4=36
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