railway RRB ALP (CBT 1 + CBT 2 + CBAT) Mock Test Series 2025 (New) Quantitative Aptitude Number System LCM and HCF

The LCM of two numbers is 147, and their HCF is 7. If one number is 21, find the other number.

1
49
2
21
3
7
4
28
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