AlgebraEasy–MediumHeight of a stack from a base and layers
Algebra practice question
A base block is 30 centimetres high, and each tile added on top raises the stack by 2 centimetres. What is the height, in centimetres, of the stack with 12 tiles?
Answer: 54
30 + 2(12) = 54.
Common wrong answers
- If you answered 24
- 24 is the tiles alone.
- If you answered 44
- 44 adds 12 and 2 to 30.
- If you answered 360
- 360 multiplies 30 by 12.
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