91 x 21 = 1911
112-21 = 91
gcf of 91 and 21 = 7
4.3333
The LCM is 273.
The LCM of 21 and 91 is 273.
The HCF of 21, 84 and 91 is.... 1 ! The number 91 is a prime number.
For 117, 91, 65, 21 the LCM is: 4,095
21/91 = 3/13
7 is the highest common factor of 21, 77 and 91.
91 x 91 = 8281
91 times 7 is equal to 637.
The GCF is 7.