2.50
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.
It really isn't worthwhile to find complicated divisibility rules for large numbers like 305 - because if there really is a divisibility rule, it will certainly be more complicated than just doing the division.Anyway, 305 = 5 x 61, so if a number is divisible by 305, it must be divisible by 5, and by 61. Divisibility by 5 is fairly simple; a number is divisible by 5 if it ends with 0 or 5. For divisibility by 61, see the following link; it looks fairly complicated.http://www.primepuzzles.net/puzzles/puzz_101.htmIt really isn't worthwhile to find complicated divisibility rules for large numbers like 305 - because if there really is a divisibility rule, it will certainly be more complicated than just doing the division.Anyway, 305 = 5 x 61, so if a number is divisible by 305, it must be divisible by 5, and by 61. Divisibility by 5 is fairly simple; a number is divisible by 5 if it ends with 0 or 5. For divisibility by 61, see the following link; it looks fairly complicated.http://www.primepuzzles.net/puzzles/puzz_101.htmIt really isn't worthwhile to find complicated divisibility rules for large numbers like 305 - because if there really is a divisibility rule, it will certainly be more complicated than just doing the division.Anyway, 305 = 5 x 61, so if a number is divisible by 305, it must be divisible by 5, and by 61. Divisibility by 5 is fairly simple; a number is divisible by 5 if it ends with 0 or 5. For divisibility by 61, see the following link; it looks fairly complicated.http://www.primepuzzles.net/puzzles/puzz_101.htmIt really isn't worthwhile to find complicated divisibility rules for large numbers like 305 - because if there really is a divisibility rule, it will certainly be more complicated than just doing the division.Anyway, 305 = 5 x 61, so if a number is divisible by 305, it must be divisible by 5, and by 61. Divisibility by 5 is fairly simple; a number is divisible by 5 if it ends with 0 or 5. For divisibility by 61, see the following link; it looks fairly complicated.http://www.primepuzzles.net/puzzles/puzz_101.htm
If a number ends with 0, it is divisible by 10. If a number ends with 5 or 0, it is divisible by 5.
If the number ends in 5 or 0 the whole number is divisible by 5.
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.
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 divisblity rule by 8
If a number is divisible by 5 and 7, it's divisible by 35.
Divisibility is a noun meaning being capable of being divided. Example sentences: "The rule for divisibility by 5 is that the number ends in 0 or 5." "The easy divisibility of the cookies prevented fights among the children." "The divisibility of this pie is questionable, at best."
The divisibility rule for 2 works because the base of our number system, 10, is divisible by 2.
No, because then you would have a remainder of 2. The divisibility rule for 5 is that it needs to end in a zero or a five.
Able to Be Divided
A number is divisible by 15 if it is divisible by the prime factors of 15, that is, 5 and 3.