See if you can find a whole number "n", such that 7n (i.e., 7 times n) = 45. If you can find such a number, then 45 is a multiple, by definition. Otherwise it is not.
No, it is not
315
630
42840
45 is a multiple of 3. 45 is a multiple of 5. 45 is not a multiple of 33. 3 x 3 x 5 = 45
45 is a multiple of both 15 and itself, so 45 is the least common multiple of 15 and 45.
Yes, 123456789 is a multiple of 3. To find out if it's a multiple of 3, you add the digits. In this case you would add 1+2+3+4+5+6+7+8+9=45. Now you take that 45 and divide by 3. If there is no remainder it is a multiple but if there is a remainder it is not a multiple. So in this case 45/3=15 with no remainder.
Any multiple of 45.
Yes, 45 is a multiple of 15.
The least common multiple of 45 , 3 , 5 = 45
The Greatest Common Factor of 15, 45: 15The Least Common Multiple of 15, 45: 45
The Least Common Multiple of 45, 3, and 5 is 45.