If '+' means 'subtraction', '-' means 'multiplication', '÷ ' means 'addition' and ' ×' means 'division', then what is the value of the following expression?
23 - 31 + 135 × 15 ÷16
Show answer & explanation
Correct answer: D
Explanation
The correct answer is option 4 i.e. 720.
According to given information,
| Signs | + | - | ÷ | × |
| Meaning | subtraction | multiplication' | addition | division |
Given expression: 23 - 31 + 135 × 15 ÷16
After changing signs,
23 × 31 - 135 ÷ 15 + 16
⇒ 23 × 31 - 9 +16
⇒ 713 - 9 + 16
⇒ 729 - 9 = 720
The value of the expression is '720'.
Hence, 720 is the correct answer.