Problem 4 · 2016 Math Kangaroo
Easy
Arithmetic & Operations
careful-counting
Ten friends go to Robert’s birthday party. Six of them are girls. How many boys in total are at the party?
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Answer: B — 5
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Hint 1 of 2
Don't forget whose party it is — the birthday child is there too.
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Hint 2 of 2
Count the boys among the ten friends, then add Robert himself.
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Approach: subtract girls, then add the host
- Of the ten friends, 6 are girls, so 10 − 6 = 4 are boys.
- Robert, the birthday boy, is also there, so add 1.
- Total boys at the party: 4 + 1 = 5.
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