31. Find HCF of 12, 15, 18 and 21? / 12, 15, 18 और 21 का HCF ज्ञात कीजिए?
6
8
3
12
Answer / उत्तर -3
Indian army gd previous year question paper 10th based - kumayun ARO ( कुमायुं ) - 23 February 2020
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