Q16.
Here are some number cards.
Joe picks two even numbers.
Dev picks two odd numbers.
Joe gives one of his cards to Dev.
Dev gives one of his cards to Joe.
Joe says,
‘Now my cards are both square numbers’.
Dev says,
‘Now my cards are both multiples of 5’.
What numbers did they each start with?
Joe started with
and
Dev started with
and
2 marks
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