12, 30, 45, 69, 78
That's not going to work. Multiples of 5 end in 5 or 0. With three numbers, one of those would have to repeat.
0, 0, 0, 0 and 0.
The first five multiples of four are: (Not including 4x0=0) 4,8,12,16,20
No No
There are 13 two-digit multiples of 7.
Sure, but they might not still be multiples.
That's not going to work. Multiples of 5 end in 5 or 0. With three numbers, one of those would have to repeat.
0, 2, 4, 6, 8
A quick way to check multiples of five is to remember the following rule: All numbers that end in 0 or 5 are multiples of 5. All multiples of 5 end in 0 or 5. In this case, we have 1455, which ends in 5. Therefore, it is a multiple of 5.
9
7, 42, 63, 98, 105
0, 0, 0, 0 and 0.
Traditionally, 0 is not listed among the first five multiples. To avoid confusion, questions will frequently say, "List the first five non-zero multiples of 9." The answer is 9, 18, 27, 36 and 45. If 0 is included, put it first.
Five multiples of three that use each digit from 0 to 9 only once are: 12, 30, 45, 69, and 87.
7, 42, 63, 98, 105
The first five multiples of four are: (Not including 4x0=0) 4,8,12,16,20
2,5,13,647,809