it i s eather 1X21 11X11 and
3x7=21 3 and 7 are prime numbers, so 3x7 is the factor tree of the number 21.
3 times 6.80
2x7 = 14 x7 = 7 3x7 = 3*7 = 21
3x7 = 21
3*7 = 21
3, 7, 21. 3x7 is the only equation that equals 21, and so these are the only factors of 21.
Factors are numbers you can multiply together to get another number. 21: (1, 21) (3, 7)
-21
21
3x7
3x7=21 , 1x21=21..
3 is the GCF of 12, 18, and 21. 3x4=12 3x6=18 3x7=21 3 is the GCF of 12, 18, and 21.