20
The largest multiple of anything is infinite.
12
There are four of them...
-- Every multiple of 12 has a remainder of 3 when divided by 9.-- The largest multiple of 12 that's less than 220 is (12 x 18) = 216.-- So there are 18 of them.
24
24
The highest common factor of 6 and 8 is always 2 - it has to be less than or equal to the smaller of the two numbers.If you mean the highest common multiple of 6 and 8 less than 100, then it is 96.All common multiples of 6 and 8 are multiples of their Lowest Common Multiple.The LCM(6, 8) = 24, thus all common multiples of 6 and 8 are multiples of 24.The largest one less than 100 is:100 ÷ 24 = 41/6⇒ highest multiple of 24 less than 100 is 4 x 24 = 96.
4 x 5 = 20
The multiples of 4 that are less than 30 are 4, 8, 12, 16, 20, 24, 28. So the greatest multiple of 4 that is less than 30 is 28.
6 12 18 24 30
24 will go into 52 two times, as 2 times 24 equals 48. This is the largest multiple of 24 that is less than or equal to 52. The remainder would be 4, since 52 minus 48 equals 4.
To find the multiples of 8 that are less than 60, we can start by dividing 60 by 8, which equals 7 with a remainder of 4. This means that the largest multiple of 8 less than 60 is 8 x 7 = 56. Therefore, the multiples of 8 that are less than 60 are 8, 16, 24, 32, 40, 48, and 56.