Question

Most common factor of 21 and 24?

Answer 1

The real common factors of 21,24 is 1, 3 

LCM of 21 and 24


Multiples of 21= 21, 42, 63, 84, 105, 126, 147, 168, 189, 210, 231, 252, 273, 294, 315, 336, 357, 378, 399, 420, 
Multiples of 24= 24, 48, 72, 96, 120, 144, 168, 192, 216, 240, 264, 288, 312, 336, 360, 384, 408, 432, 456, 480,

Least common multiple (LCM) of 21 and 24= 168

HCF of 21 and 24

Highest common factor (HCF) is calculated using real common factors above

HCF of 21 and 24 = 3

GCF of 21 and 24

Greatest common factor (GCF) is the same as Highest common factor (HCF)

GCF of 21 and 24 = 3

LCD of 21 and 24

lowest common Denominator (LCD) is the same as Least common multiple (LCM)

lowest common Denominator (LCD) of 21 and 24= 336