Problem 10 · 2013 Math Kangaroo
Medium
Arithmetic & Operations
total-then-divide
Vera’s mum has made sandwiches, each using two slices of bread. There are 24 slices in a pack. How many sandwiches can she make with two whole packs and one half pack of bread?
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Answer: D — 30
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Hint 1 of 3
First work out the total number of bread slices Vera's mum has.
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Hint 2 of 3
A half pack has half of 24 slices, which is 12 slices.
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Hint 3 of 3
Each sandwich eats 2 slices, so split the total into pairs to count the sandwiches.
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Approach: count slices, then divide by 2
- Two whole packs and one half pack give 24 + 24 + 12 = 60 slices.
- Each sandwich uses 2 slices, so 60 ÷ 2 = 30 sandwiches.
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