10.What is the HCF of 9/10,12/15, 18/35 and 21/40 is :
9/10,12/15, 18/35 21/40 ਐਚ ਸੀ ਐਫ ਪਤਾ ਕਰੋ।
A. 3/5 B. 252/5
B. 1/280 D. 63/700
Answer: c
(60)
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