If the number ends in 5 or 0 the whole number is divisible by 5.
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By tautology. If it did not work, it would not be a divisibility rule!
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.
What is the divisblity rule by 8
There is no easy rule for divisibility by 34.