Problem 2 · 2018 Math Kangaroo
Easy
Arithmetic & Operations
addition
Susanne is 6 years old. Her sister Lisa is 2 years younger. Her brother Max is 2 years older than Susanne. How old are the three siblings altogether?
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Answer: D — 18
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Hint 1 of 2
Work out each sibling's age from Susanne's.
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Hint 2 of 2
Lisa is younger, Max is older — then just add the three ages.
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Approach: find each age, then add
- Susanne is 6.
- Lisa is 2 younger: 6 − 2 = 4.
- Max is 2 older: 6 + 2 = 8.
- Total: 6 + 4 + 8 = 18.
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