21 * 5 equals 105, if that's what u meant.
105
----It is Composite!It is composite because the number 5 goes into it!
4 with the remander of 8 i think
5 x 21 = 105
X times 105% = 105 X x 1.05 = 105 X = 105/1.05 X = 100
4 x 100 = 400 4 x 5 = 20 100 + 5 = 105
105 is not a prime number. You can readily see that 3 and 5 go into it, and 7 goes into it too. The number ends in 5, and 5 goes into any number ending in 0 or 5. The sum of the digits is 6, and when the sum of the digits is divisible by 3, then so is the original number.
1 x 105, 3 x 35, 5 x 21, 7 x 15 = 105
55 goes into 20, 4 times.5 goes into 75, 15 times.
5 times 805
5 3/5
21 = 105/5