100 Math Brainteasers by Zbigniew Romanowicz

Author:Zbigniew Romanowicz
Language: eng, pol
Format: epub
Publisher: Tom eMusic
Published: 2012-09-06T16:00:00+00:00

58. THE TWINS AND THE REST

Jack is four years older than Mark and eight years older than Dave. The product from Mark’s and Paul’s ages is greater by 16 than the product from Jack’s and Dave’s ages. In this foursome, two boys are twins. Give their names.

59. THE CASHIER’S MISTAKE

Michael went to his bank to cash a check. The cashier, quite by mistake, paid him out as much in dollars as he should have had paid in cents, and as much in cents as he should have had paid in dollars. Michael did not count the money before pocketing it and paid no attention to a five-cent coin that he dropped on the floor in the process. He counted the money at home and found to his surprise that he had twice as much as the amount on the check. How much did Michael’s check amount to?

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