Discussion
In the given question if + means -, × means /, - means + and / means × then find out the answer of the following question.
120 - 120 × 10/3
Answer: D
The answer is 156. Replace the signs by their stated meanings: + means -, × means /, - means + and / means ×. Then 120 - 120 × 10/3 becomes \[ 120 + 120 \div 10 \times 3 \] By BODMAS the division and multiplication come first: \[ 120 \div 10 = 12,\quad 12\times 3 = 36 \] \[ 120 + 36 = 156 \] The values 48, 58 and 128 come from applying some of the changes and not others, for example treating - as a minus again.
Division and multiplication have equal rank and are taken left to right, so 120 / 10 is done first and then multiplied by 3. Multiplying 10 by 3 first would give a different result.
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