3
1 and 3
The HCF is 3
1 and 3.
1 and 3.
There is no number that goes into both. must be a trick questionthis is another person not the same one :)the number that goes into 12 and 21 is 3 which is a 5th grade problemwho ever said theres no number that goes into 12 and 21 is WRONG!
1, 2, 3, 4, 6, 12
1 and 3 will divide into both numbers with no remainders
12/3 since you have to find out how many 3 goes into 12 and the answer is 4.
Four goes into both 12 and 4. Four goes into 12 three times, and into 4 once. 12/4 = 3 4/4 = 1
iif a factor is something that goes into a bigger number. a trick is to add up all the digits in this case 9+1+2 and see if 3 goes into that. for this it is 12 and 3 goes into 12 so it also goes into 912. hope this helps :)
1, 2, 3, 4, 6, 12.