7, 14, 21, 28, 35
5 + 10+15+20=50 ans
The first 3 multiples of 7 are: 7, 14, and 21.
Common multiples of 7 and 5 include 35, 70, 140, etc.
the next 5 multiples of 7 are: 14,21,28,35,42 and if you don't know the rest they are 49,56,63,70,77 and 84
The first four multiples of five: 5, 10, 15, 20
7, 14, 21, 28, 35
7, 14, 21, 28, 35
35 and 70
35, 70, 105, etc.
The first common multiple of 3 4 5 and 7 is 420.
5 + 10+15+20=50 ans
These are the first 90 multiples of 7:714212835424956637077849198105112119126133140147154161168175182189196203210217224231238245152159266273280287294301308315322329336343350357364371378385392399406413420427434441448455462469476483490497504511518525532539546553560567574581588595602609616623630
35, 70, 105
35, 70, 105
7, 14, 21, 28, 35
Example: 5 and 7 List the multiples of 5. 5, 10, 15, 20, 25, 30, 35, 40... List the multiples of 7. 7, 14, 21, 28, 35, 42... The LCM is the first number that appears on both lists.