Question
What is the average of first 28 multiples of
2.8?Solution
First term = 2.8 x 1 = 2.8 Last term = 2.8 x 28 = 78.4 Required average = (2.8 + 78.4)/2 = 40.6
If the square root of the product of two numbers equals their average, then
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The next figure is
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