Elitmus Exam Numerical Ability LCM and HCF

The difference of two numbers is 14.their lcm and hcf are 441 and 7.find the numbers.
a, 21,35
b, 35,49
c, 49,63
d, 63,77

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Elitmus Other Question

If the sum of 4 times a number A and 3 times a number B is equal to the sum of number B and seven times the number A, then what is the value of A:B?
a, 2:3 b,3:2 c, 4:3 d, 3:4
If 6^(x-3)=36^(x-5), then what is the value of X?
a,-1
b,2
c,7
d,No value will agree