The H.C.F of \(\frac{9}{{10}},\frac{{12}}{{25}},\frac{{18}}{{35}}\) and \(\frac{{21}}{{40}}\) is:

The H.C.F of \(\frac{9}{{10}},\frac{{12}}{{25}},\frac{{18}}{{35}}\) a

1.	The H.C.F of \(\frac{9}{{10}},\frac{{12}}{{25}},\frac{{18}}{{35}}\) and \(\frac{{21}}{{40}}\) is:
A.	\(\frac{3}{{2600}}\)
B.	\(\frac{3}{{1400}}\)
C.	\(\frac{3}{{2700}}\)
D.	\(\frac{{63}}{{700}}\)
Answer» C. \(\frac{3}{{2700}}\)