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What is the divisibility rule for 143?
The number must be divisible by 13 and by 11.
What is the divisibility rule of 18?
It is even and the sum of its digits is divisible by 9.
What is the divisibility rule for 34?
There is no easy rule for divisibility by 34.
Divisibility rule of 11?
if the difference of the sum at the alternate places is divisible by 11 then it is divisible by 11
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 the number 129 prime or composite?
129 is divisible by 3. 1+2+9=12 and 12 is divisible by 3. That is the rule of divisibility by 3.
Write a rule to determine when a number is divisible by 12?
A number is divisible by 12 if it is divisible by 3 AND it is divisible by 4. Rule 1a (Divisibility by 3): Add up all the digits of the number. Is this number divisible by 3? Rule 1b (Divisibility by 4): Is the number formed by the last two digits of the original number (the number left after deleting the hundreds, thousands, millions etc) divisible by 4? If the answer to 1a is NO, then the number is not divisible by 3 and so not divisible by 12. In this case, obviously, rule 1b is irrelevant. If the answer to 1b is NO, then the number is not divisible by 4 and so not divisible by 12. If the answer to both 1a and 1b is YES, then the number is divisible by 12.
Example of divisibility rule for 21?
a number is divisible by 12 if the number is also divisible by both 3 and 7. You mean a number is divisible by 21 if it is divisible by 3 and 7.
Why does divisibility rule for 2?
The divisibility rule for 2 works because the base of our number system, 10, is divisible by 2.
What is the divisibility rule of 85?
The rule is: if a number is divisible by 5 and 17 at the same time, that number is divisible by 85
What is the divisibility rule for 2 squared 1?
2 squared 1 = 4 so the divisibility rule is that it is divisible by 1, 2 and 4.
What is the divisibility rule for 143?
The number must be divisible by 13 and by 11.
What is the divisibility rule of 18?
It is even and the sum of its digits is divisible by 9.
What is a divisibility rule for 6?
A number has to be even and also divisible by 3.
What is the number2 divisibility rule?
If the number is even, it's divisible by 2.
What is the divisibility rule for 14?
The number must be divisible by 2 and by 7.
What is the divisibility rule for 34?
There is no easy rule for divisibility by 34.
