Question

The L.C.M of two numbers 42 and 70 is 210. Their H.C.F is ___ .(Provide the numerical value as your answer.)

Answer 1

Product of two numbers = H.C.F of the two numbers $\times$ L.C.M of the two numbers

Given, L.C.M of 42 and 70 = 210

Substituting the given values, we get
42 $\times$ 70 = H.C.F $\times$ 210

$\Rightarrow$ 2940 = H.C.F $\times$ 210

$\therefore$H.C.F = $\frac{2940}{210}$ = 14