Question
The sum and product of two numbers are 18 and 72,
respectively. If 'b' represents the sum of their reciprocals, then which of the following is true.Solution
ATQ, Let the numbers be x and y. Given, x + y = 18 and xy=72. According to the question, b = [(1/x)+(1/y)] = {(x+y)/xy} So, b = 18/72 = 0.25, which is less than 0.5.
If all dogs are mammals, and some mammals are brown, can we conclude that some dogs are brown?
Which two numbers from amongst the given options should be interchanged to make the given equation correct?
(240 ÷ 2 + 5) × 8 + 15 × 8 = 100
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