If a number ends with 0, it is divisible by 10.
If a number ends with 5 or 0, it is divisible by 5.
2.50
Use the divisibility rule for 10. If the number is divisible by 10, then it is obviously also divisible by 5.
if the number ends on 5 or 0 the number is divisible by 5
If the rules for 2 and 3 work, the number is divisibale by 5.
If the number ends in 5 or 0 the whole number is divisible by 5.
2.50
The divisibility rule for 2 works because the base of our number system, 10, is divisible by 2.
Use the divisibility rule for 10. If the number is divisible by 10, then it is obviously also divisible by 5.
If the number is whole and ends in zero, it's divisible by 10
If the number ends in 5 or 0 the whole number is divisible by 5.
if the number ends on 5 or 0 the number is divisible by 5
If the rules for 2 and 3 work, the number is divisibale by 5.
By tautology. If it did not work, it would not be a divisibility rule!
If a number ends in 0, it is divisible by 10.
If the number ends in 5 or 0 the whole number is divisible by 5.
all numbers whose last digits are 5 and 0
The special divisibility rule of 17 is "Take the difference of the rest of the digits and the last digit times 5." For instance: 17 1 - 7 * 5 = 1 - 35 = -34 which is divisible by 17.