What are 8 and 15 both divisible by?
An integer divisible by 8 and 15 must also be divisible by 24.
Which of the following integers is divisible by 8?
A number is divisible by 8 if the numbers formed by the last three digits is divisible by 8. Consider the following numbers which are divisible by 8, using the test of divisibility by 8: 1792, 1824, 2000, 2880, 3320. In 1792 the last three digits are 792, which is divisible by 8.
How many numbers are divisible by 15?
There is no one single rule for divisibility by 15, but every number that is divisible by 15 must be divisible by the factors of 15, namely 3 and 5. If your son knows these divisibility rules, then for divisibility by 15, he just includes both conditions. for divisibility by 5, the number must end in a 5 or a 0.
How do you check if a number is divisible by 8?
A number is divisible by 8 if its last three digits are divisible by 8. For example, 880 and 905,256 are divisible by 8 but 74,513 is not divisible by 8. To check divisibility by 8, divide the last three digits of the number by 8. If the result is a whole number, then the original number is divisible by 8.
How did we know if a number is divisible by another number?
One whole number is divisible by another if, after dividing, the remainder is zero. 18 is divisible by 9 since 18 ÷ 9 = 2 with a remainder of 0. If one whole number is divisible by another number, then the second number is a factor of the first number. Since 18 is divisible by 9, 9 is a factor of 18.
How do you know if a number is divisible by 12?
In order to know if a number is divisible by 12, you have to first check if it is divisible by 3 and 4. If it is divisible by both 3 and 4, then the number is divisible by 12.
How do you check divisibility by 15?
According to the divisibility rule of 15, a number is divisible by 15 if the number is divisible by 3 and 5 both. So, we need to check the divisibility of the numbers by 5 and 3. According to the divisibility rule of 5, a number is divisible by 5 if the number is ending with either 0 or 5.
How could you test if a number is divisible by 12 15 or 24?
If the number is separately divisible by 3 and 8 then the number is divisible by 24. This would work because 3 and 8 are relatively prime to each other, meaning that they don’t share any factor other than 1.
How do you know if a number is divisible by 15?
How to check if a number is divisible by another number?
Divisibility calculator determines if a number is divisible by another number without actually performing the division. For this, it uses the defined divisibility rules. It displays all the steps used for the calculation. Input the dividend, select the divisor and click on “Check”. The results will be displayed at the bottom.
When is x x divisible by another number?
Divisible By A number x x is divisible by another number y y if x x ÷ y y gives remainder 0 0
How is an integer divisible by LCM ( a1, a2, ak )?
In general, if an integer is divisible by a1, a2, …, ak, then the integer is divisible by lcm(a1, a2, …, ak). The proof of this claim immediately follows from the fact that if a | bc and gcd (a, b) = 1, then a | c, which follows immediately from the definition of gcd. Hence, in your case, the integer is divisible by 120.