general Maths Puzzle

A father has six children .all the children are born at regular intervels.if the sum of their ages of all the children and father is 186. calculate the age of the elder son, when the younger sons age is 3.

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general Other Question

A ball is dropped from a height of 15 feet.Every time it rebounces to half of the height. how many feet it travelled? To type the digits from 1-1000 how many key strokes are needed?