5 15 25 35
6,12,18,26 they are the first four multiples of six
The first four multiples of 20 are: 20 40 60 80
8,16,24,32
The first five multiples of four are: (Not including 4x0=0) 4,8,12,16,20
The first four multiples of five: 5, 10, 15, 20
5 15 25 35
15, 25, 35, 45
6,12,18,26 they are the first four multiples of six
2100, 4200, 6300, 8400
25 and 50
The sum of the first 25 numbers is 25*26/2 = 325 So the sum of the first 25 multiples of 12 is 325*12 = 3900
The highest power of 25 that divides the product of the first 100 multiples of 5 is 50. This is because for each multiple of 25, we have an extra factor of 25. Since there are 4 multiples of 25 in the first 100 multiples of 5, we have a total of 50 factors of 25.
The first four are; 4,8,12,16
The lowest common multiple is 18. The first four common multiples are thus the first four multiples of 18 and are: 18, 36, 54 and 72.
The first four multiples of 20 are: 20 40 60 80
It is 75.