If ‘+’ means ‘+’, ‘–’ means ‘×’ and ‘×’ means ‘–’, then what is the value of 77 × 17 + 13 + 34 + 9 – 5?
Answer & explanation
Correct answer: option 3
The correct answer is Option (3) → 152
First write the expression with the real signs, then work it out by BODMAS (multiplication before addition and subtraction).
‘×’ becomes ‘–’ and ‘–’ becomes ‘×’: 77 – 17 + 13 + 34 + 9 × 5
\(9\times5=45\)
\(77-17=60\)
\(60+13+34+45=152\)