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Q: What is the multiple of 4 less than 15?

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989. If there is a remainder of 2 when divided by 3, the number is one less than a multiple of 3. If there is a remainder of 4 when divided by 5, the number is one less than a multiple of 5. Thus the number required is one less than a multiple of the lowest common multiple of 3 and 5 (that is 15). So what is needed is an even multiple of 15 less than or equal to 1000: 1000 ÷ 15 = 662/3 Thus the highest even multiple of 15 not greater than 1000 is 66 x 15 = 990, and the required number is 989.

3/15 is less than 4/7.

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.

As 100 = 4 x 25 the biggest multiple of 4 less than 100 is 4 x (25 -1) = 96

12 is the only number which satisfies this. Multiples of 4 are: 4, 8, 12, 16, . . . .

It is 28 because 4*7 = 28

19

4 x 5 = 20

Every prime number except 2 must be odd. This is because if it were even it would be divisible by 2 and so wouldn't be a prime number. The next point to note is that all odd numbers are one more or one less than a multiple of 4. Because 2 more than a multiple of 4 is even, and 3 more than a multiple of 4 is the same as 1 less than the multiple of 4 above. Thus every prime number except 2 must be 1 more or 1 less than a multiple of 4.

12

60

The least common multiple of 4 and 5 is 20. The least common multiple of 15 and 20 is 60. (Thus, the least common multiple of 4, 5, and 15 is 60.) Any multiple of 60 will also be a multiple of 4, 5, and 15.

104

60

12

60

4*12 = 48

36

No, 8 is a multiple of 2, since it is 4 x2, but 2 is less than 8 so it can't be a multiple.

10, 20, 30,40. 4 dozen is 48.

84

4 and 16 both qualify.

14 is less than 15. 1/4 is greater than 1/5, if that is what you meant.

4, for a start.

3,7,11,19,23,31,43,47,51,59,67,71,79...

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