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Maths Puzzle
how to solve the width of the river without crossing it? if you only have a big protractor and a meter stick?
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self Other Question
A biologist wants to estimate the number of elk in a wildlife preserve. She sedates 125 elk and clips a small radio transmitter onto the ear of each animal. The elk returns to the wild, and after 6 months, the biologist studies a sample of 920 elk in the preserve. Of the 920 eld sampled, 34 have radio transmitters. Approximately how many elk are in the whole preserve?
A mother is 21 years older than her child. In exactly 6 years from now, the mother will be exactly 5 times as old as the child.
Where's the father?