No, but 21 is a multiple of 7.
Any multiple of 21.
3 * 7
No if you start the seven times table - 1x7=7, 2x7=14 , 3x7=21 , 7x4=28 So no it is not a multiple of seven :3
3, as 3 can only go into 3 once and 21 seven times.
A multiple of seven
No but 21 is a multiple of 3 because 7*3 = 21
3 * 35 = 5 * 21 = 7 * 15 = 105
21 is a multiple of 7 because, 3*7 = 21
1197 21*57 = 1197 19*63 = 1197
21
The LCM of 10 and 21 is: 210Least Common Multiple (LCM) for 10 21 is 210
No, it is not possible. Every multiple of 21 is a composite number. 21 is a composite number and its factors are 1, 3, 7 and 21(4 factors). Any multiple of 21 must have all the factors of 21. So, every multiple of 21 has at least 4 factors. And a prime number has only two factors so, any multiple of 21 can't be prime.