Robert and David were preparing to have a water balloon fight. 'No Fair' cried Robert, 'You have 3 times as many as I do!' David said 'Fine!' and gave Robert 10 more balloons. 'Still not fair!' argued Robert, 'You still have twice as many as I do.' How many more balloons must David give Robert for them to have the same number? -Riddles

1 Answer

Answer :

David must give Robert another 20 water balloons, giving them each 60. Robert started with 30 water balloons and David with 90.

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