Cutting Hair

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Determine how long a hair cutter works on a busy day.

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How Old are Three Daughters?

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Help a census taker figure out a father’s riddle about his daughters’ ages.

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Non Repeating Decimals

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Examine the relationship between the denominator and the numerator in fractions with non repeating decimal representations.

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Six Divisors

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Find the divisors of the number N.

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Perfect Numbers

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Find perfect numbers.

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Consecutive Primes

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Investigate sums and averages of two consecutive primes.

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