exam Maths Puzzle Numerical Ability

The width of a rectangle is one half its length. The perimeter of the rectangle 54cm. What are the width and length of the rectangle?

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exam Other Question

The test statistic that is used to test hypotheses about the mean when a small sample is involved follows a _________ distribution.
a. t
b. z
c. chi-square
d. binomial Find the vertices of the ellipse x^2/4 + y^2/25 = 1