Apples are packed in boxes of 8 and 15. What is the biggest number of apples that would require loose apples?
A country only has 5p and 7p coins. Make a list of prices that you could give exact money for. What is the highest prices that you couldn't give exact money for?

• 97 is the answer for Q1.
  23is the answer for Q2.
  NOTE: use ab-(a+b) to solve as a shortcut method.
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