A number is divisible by 2 if its one (one place) digit is an even number or zero. Eg. 2, 8, 12, 30 its ten (ten place) digit is an even number or zero. Eg. 2, 8, 12, 30.
A number is divisible by 3 if the sum of its digits is divisible by 3 if the sum of its digits is divisible by 6 if the sum of its digits is divisible by 9.
3. A number is divisible by 4 if the numbers formed by its last two digits is divisible by 4 the last two digits are both zeroes. the numbers formed by its last two digits is divisible by 8 the last digit is both zero.
A number is divisible by 5, if its last digit (one’s digit is either 0 or 5 ) Eg.50, 65, 115 the number is divisible by 20 the number is divisible by 10.
A number is divisible by 5 if its last digit (one’s digit is either 0 or 5 ) its last digit (one’s digit is either 6 or 9 ).
A number is divisible by 6 if its divisible by 2 if its divisible by 3 if its divisible by 2 and 3.
A number is divisible by 9 if the sum of its digit is divisible by 9 the sum of its digit is divisible by 99 the sum of its digit is divisible by 6.
A number is divisible by 10 if its one’s digit is zero its one’s digit is five its one’s digit is two.
A number is divisible by 11 if the difference between the sum of the digits in odd places and even places is either zero or divisible by 11 the number is divisible by 1 the number is divisible 21.
A number is divisible by 12 if it is divisible by 3 and 4 it is divisible by 9.
A number is divisible by15 if it is divisible by 3 it is divisible by 5 it is not divisible by 3 and 5 it is divisible by 30 has two factors.
What is a prime number ? is a whole number, is greater than 1 is greater than 2 is less than 2.
This number is the only even prime number. (All other prime numbers are odd.) 2 4 6 8 10.
|
