Q: Which two-digit number less than 20 is multiple of both 4 and 6?

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Both 21 and 42 will work. ■

The only number that satisfies both conditions is... 15

12?

24

7

Related questions

Both 21 and 42 will work. ■

The only number that satisfies both conditions is... 15

4 and 16 both qualify.

6 is a correct✅

No. A multiple cannot be less than the number it is compared to. An LCM can never be less than the greatest number in the set.

The number you seek is 78 - it is a multiple of both 6 and 26 and is less than 85. To be a multiple of both 6 and 26 it must be a multiple of their lowest common multiple: 6 = 2 x 3 26 = 2 x 13 lcm = 2 x 3 x 13 = 78 So it must be one of 78, 156, 234, ...; only 78 satisfies the criteria of being less than 85.

No. A common multiple is a multiple of both numbers. There is no multiple of 17 that is less than 17.

It is 30.

This number could be 120 or 240.

12?

24

7