Answer: 8 because 12 can be 12, 24, 36, 48 not 40. 10 can be 10, 20, 30, 40 not 24. 8 can be 8, 16, 24, 32, 40, which contains, 24 and 40, and 8 is greater than 4 so there is your answer, 8.
the greatest common factor of 24 and 40 is a 8
Answer:
20
Step-by-step explanation:
126.
This is the number of combinations of 4 cards from 9 cards:
= 9C4
= 9! / 4! 5!.
A quick way of calculating this is
9*8*7*6
----------- = 9*2*7 = 126 combinations.
4*3*2*1
