exam Maths Puzzle Numerical Ability

The perimeter of an equilateral triangle is 18. Find its area.

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exam Other Question

1/a^2+5a+6 / 1/a+3 A bag contains 15 billiard balls, numbers consecutively from 1 to 15. Six balls are selected at random. What is the probability that the sum of the numbers on the billiard balls will be odd?