exam Maths Puzzle Numerical Ability

The parallel sides of a trapezoid are 12" and 18" long. The non-parallel sides meet when one is extended 9" and the other is extended 16". How long are the non-parallel sides of this trapezoid.

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exam Other Question

9. Evaluate the following:
a. log1/2 4
b. 1og8 64
c. log32 8
d. 1og3 81
e. pi^(log_pi 2pi) Suppose you have six families consisting of a mother, a father, and a child.

How many ways can the families sit in a row of 18 chairs such that members of each family are sitting together?