105, 210 and 315
9, 15, 21
take the first three numbers and the remaining three numbers, they both have the same patern: 15+9=24 24+1=25 and 5+9=14 14+1=15now what relates both groups is the division of the last number of the 1st group by 5 to get the first number of the remaining three which is also 5 (check it)now repeating the same thing for 15 (the last of the second three) you will get 3 then 3+9=12 then 12+1=13
for three 3 6 9 12 for five 5 10 15 20 these both numbers dont share a common denominator in the first 4 multiples
They are: 14+15+16 = 45
the sum of the first 15 prime numbers is 328 .
The common factors are: 1, 5
15, 30 and 45 have a GCF of 15.
15, 30 and 45.
15, 30, 45
They are the first three odd prime numbers.
The smallest is 15.
4, 5 and 6