Illuminations: Mara Money

Mara has 3 times as many dollars as her brother, Timmy. If Mara is given $20 by their mother, she will have 7 times as many dollars as Timmy. How many dollars does Timmy have?

This brainteaser was supplied by the Mathematical Olympiads for Elementary and Middle Schools (www.moems.org).

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National Council of Teachers of Mathematics

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Deductive Reasoning & Logical Thinking, Money

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Illuminations: Mara Money

Mara has 3 times as many dollars as her brother, Timmy. If Mara is given $20 by their mother, she will have 7 times as many dollars as Timmy. How many dollars does Timmy have?

This brainteaser was supplied by the Mathematical Olympiads for Elementary and Middle Schools (www.moems.org).

VIEW SOLUTION