exam Maths Puzzle Numerical Ability

one number is 12 more than the other. The larger number is 7 times the smaller number. Find the number.

thank you very much in advance!!!.

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exam Other Question

A family consists of a father, mother and some children. The mean age of the family is 18 years. Without the 38 year old father the mean age of the family decreases to only 14. How many children are there in the family? PLEASE HELP!

FIND ALL ROOTS OF THE POLYNOMIAL x3-x2+16x-16.