AlgebraEasy–MediumFacing pages from their sum
Algebra practice question
The page numbers on two facing pages of a book add up to 137. What is the smaller of the two page numbers?
Answer: 68
Facing pages are consecutive: n + (n + 1) = 137 → 2n = 136 → n = 68.
Common wrong answers
- If you answered 69
- 69 is the larger page number.
- If you answered 136
- 136 is 2n, before halving.
- If you answered 68.5
- 68.5 is half of 137, not a whole page.
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