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All numbers divisible by both 4 and 15 are also divisible by what numbers?
a number is 6. All numbers divisible by both 4 and 15 are the multiples of 4 and 15. Since 4 and 15 have no prime factor in common (4 = 22, 15 = 3 · 5), then the least common multiple of 4 and 15 is equal to their product, namely 4 · 15 = 60. Every other multiple of 4 and 15 is divisible by 60. Thus, if 60 is divisible by a number then all the multiples of 4 and 15 are divisible by that number. Therefore, it is enough to check by which number in the given options is 60 divisible. Only 6 divides 60 and none of the other do. The answer must be (A).
Why is 15 not a prime number?
15 is not a prime number because it is not only divisible by 1 and itself it is also divisible by 3.
What is the number that is divisible by 1-15?
16
What is the greatest common factor for 15 and 26?
1 15 is only divisible by 1, 3, 5 and 15 26 is only divisible by 1, 2, 13 and 26
13 and 15 are twin prime?
13 and 15 are not twin primes because of the two, only 13 is prime (a number that is only divisible by itself and 1). 15 is not prime because it is divisible by more than itself and 1. 15 is also divisible by 3 and 5 (3 x 5 = 15).
Is 15 divisible by 10?
No. 15 is not evenly divisible by ten.
What numbers is 15 divisible by?
15 is divisible by 1, 3, 5, 15.
Is 405 divisible by 15?
Yes 405 is divisible by 15 and the answer is 27.
Is 15 divisible by two?
No, it is divisible by 1, 3, 5, 15.
What is the divisiblity rule for 15?
A number is divisible by 15 if it is divisible by 5, and by 3. For example, 165 is divisible by 15, since it ends in 5, and the sum of its digits is divisible by 3.
What is divisibility rules for 15?
If a number is divisible by 3 and 5, it is divisible by 15.
What is divisibility rule of 15?
A number is divisible by 15 if it is divisible by the prime factors of 15, that is, 5 and 3.
Is a number that is divisible by 3 and 10 always divisible by 15?
no as 2 does not go into 15
What is a number divisible by 3 3 and 5?
15 is divisible by 3 and 5.
How do you know that a number is divisible by 15?
A number that is divisible by 15 is divisible both by 5 and 3 A number is divisible by 5 if it ends with 0 or 5 A number is divisible by 3 if the sum of its digits is divisible by 3 e.g. 4035 is divisible by 15 as it ends with a 5 and 4+0+3+5=12 which is divisible by 3
Which of these cannot be divided evenly into 15 A5 B3 C2 D1 E not of the above?
Divisibility tests:A: 5Last digit of the number is 0 or 5. Last digit of 15 is 5, so 15 is divisible by 15B: 3Sum the digits of the number; if this sum is divisible by 3, so is the original number. 1 + 5 = 6, which is divisible by 3, so 15 is divisible by 3C: 2Number is even (last digit is divisible by 2) 15 is odd, so 15 is not divisible by 2D: 1All numbers are divisible by 1. 15 is a number, so it is divisible by 1.Thus 15 is not divisible by C (2).
What is the smallest number that is divisible by 20 and 15?
The smallest number that is divisible by 20 and 15 is 60.
