Advanced MathMediumGrowth by 50% over two periods
Advanced Math practice question
A sapling is 40 centimetres tall. Its height increases by 50% each year. How tall, in centimetres, will it be in 2 years?
Answer: 90
40 × 1.5² = 40 × 2.25 = 90.
Common wrong answers
- If you answered 60
- 60 is after ONE year.
- If you answered 80
- 80 adds 50% of 40 twice (linear).
- If you answered 120
- 120 triples the height (40 × 3).
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