AlgebraEasyCount of one kind from a total
Algebra practice question
A pencil case holds 5 items, each of which is either a pen or a pencil. If there is exactly 1 pencil, how many pens are there?
Answer: 4
pens + 1 = 5, so pens = 4.
Common wrong answers
- If you answered 1
- 1 is the pencil.
- If you answered 5
- 5 is the total.
- If you answered 6
- 6 adds 1 to 5.
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