Numerical: coded operations MCQ — 2 Practice Questions with Answers

Explanation

Replace each coded letter with its given mathematical sign. The expression becomes 30 ÷ 2 + 3 × 6 - 5. Apply the standard order of operations: division and multiplication first, from left to right. Thus 30 ÷ 2 = 15 and 3 × 6 = 18. Now the expression is 15 + 18 - 5, which gives 33 - 5 = 28. The larger values arise only if the operations are read without proper precedence, and 35 or 38 do not match the coded calculation.

Explanation

First replace each symbol by its given meaning. The expression 124 ÷ 32 - 8 + 2 × 11 becomes 124 + 32 ÷ 8 × 2 - 11. Now apply normal order of operations: division and multiplication before addition and subtraction. So 32 ÷ 8 is 4, and 4 × 2 is 8. The expression becomes 124 + 8 - 11, which equals 121. The values 120, 132, and 144 come from either replacing the symbols incorrectly or ignoring the usual operation order.