book Maths Puzzle Numerical Ability

Will 1,000,000 dollars fit in a standard breif case?
breif case 15"h x 19"w x 5" D
one dollar bill 6" H x 2.5 W

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book Other Question

During the past year a ceratain dentist had 1/4 more patients than he did during the previous year. However, during the past year 1/5 of the patients did not pay their dentist's bi how do you solve using a linear combination method?