A submarine is at a depth of 40 m below sea level. If sea level is taken as 0, which integer represents its position?
- A.40
- B.−40 ✓
- C.0
- D.−4
Explanation: Below sea level is represented by a negative integer, so 40 m below sea level is −40.
Class 6 IMO Mathematics Olympiad practice · Number Sense · Integers — The Other Side of Zero
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