12
Both 21 and 42 will work. ■
The only number that satisfies both conditions is... 15
The greatest number that is a multiple of both 2 and 5 is their least common multiple (LCM), which is 10. Since you are looking for the greatest number of 3, you can find the largest multiple of 10 that is less than or equal to 3, which is 0. Therefore, the greatest number of 3 that is divisible by both 2 and 5 is 0.
12?
24
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