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What number does 5 and 15 have in common?
The number in common is 5, because it divides both 5 and 15.
What divides into 45?
The factors of 45 are 1, 3, 5, 9, 15, and 45.
Why is the gcf of 15 and 12 3?
Because 3 is the largest number that divides into both 12 and 15 evenly with no remainder.
Are 15 and 32 relatively prime?
Yes. The only number that divides both evenly is 1.
What goes in to 36 and 45 evenly?
9 divides both 36 and 45 equally. with no remainders.
What is the largest number that divides both 15 and 45 evenly?
GCF(37, 45) = 1.
What number does 5 and 15 have in common?
The number in common is 5, because it divides both 5 and 15.
What divides into 45?
The factors of 45 are 1, 3, 5, 9, 15, and 45.
How many times does 15 divide in 149?
2235
Why is the gcf of 15 and 12 3?
Because 3 is the largest number that divides into both 12 and 15 evenly with no remainder.
Are 15 and 32 relatively prime?
Yes. The only number that divides both evenly is 1.
Is 54723 divisible by both 3 and 9?
Yes, but 3 divides 54723 evenly and 9 does not divide 54723 evenly
Why is 3 the greatest common factor of 6 15?
Because it is the largest number that divides into both 6 and 15 evenly with no remainder.
What goes in to 36 and 45 evenly?
9 divides both 36 and 45 equally. with no remainders.
How many zeroes are there in 15 factorial in base 12?
The number of zeros is determined by how many times 12 divides into 15!. To determine this, since 12 = 22*3, we will look at how many times 2 and 3 divide into 15!. 2 divides 2,6,10,14 once, 4,12 twice, and 8 three times, so that 2 divides 15! exactly 11 times. 3 divides 3,6,12,15 once and 9 twice, so that 3 divides 15! exactly 6 times. From this, we can see that 12 divides into 15! exactly 5 times, since 125=210*35. In other words, the base-12 representation of 15! ends in 5 zeros.
What divides into 675?
1 3 5 9 15 25 27 45 75 135 225 and 675.
What is the GCD for 240 and 285?
Since 3 divides both 240 and 285, it is tempting to start with 3 as a common divisor of both 240 and 285. However, since 3 and 5 both divide 285, and 30 divides 240, we probably should start with 15. Fifteen divides into 240 16 times with no remainder. Fifteen also divides into 285 19 times. Since 16 and 19 are relatively prime to each other, 15 is the greatest common divisor of 240 and 285.
