Question

HCF and LCMof two numbers are 2 and 140. If one of the numbers is 14 find the other number?

Answer 1

HCF × LCM = Product of two numbers
2×140=14×another number
(2×140)/14=another numbers
20 is the another number.

Answer 2

for two no.s a and b we know that
a X b = H.C.F. of a,b X L.C.M of a,b
a=14 H.C.F.=2 L.C.M=140 
 14 X b =2 X 140
b=2 X 140 /14=20(ANS)