Question 8
The LCM and HCF of two numbers are 84 and 21 respectively. If the ratio of two numbers is 1 : 4, then the larger among two numbers is:
Solution
Let the two numbers be $$x$$ and $$4x$$
=> $$x\times4x=84\times21$$
=> $$x^2=(21)^2$$
=> $$x=21$$
$$\therefore$$ Larger number = $$4\times21=84$$
=> Ans - (D)
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