For a number to be divisible by 65 it must be divisible by 5 and by 13.
To be divisible by 5 it must end in 5 or 0.
Checking for divisibility by 13 is a bit harder:
For example, to check 1767675 for divisibility by 65.
The number ends in 5 so it is divisible by 5 and it remains to be seen if it is divisible by 13.
X = 176767 and U = 5 so X + 4U = 176787: a number that is too big so have another go.
X = 17678 and U = 7 so X + 4U = 17706: still too big, so another go.
X = 1770 and U = 6 so X + 4U = 1794: still too big, so another go.
X = 179 and U = 4 so X + 4U = 195: not really too big but you could have another go
X = 19 and U = 5 so X + 4U = 39 Bingo!
if you repeat,
X = 3, U = 9 and X + 4U = 39.
So the number is divisible by 13.
Divisibility by 5 and 13 implies divisibility by 65.
65 is divisible by:
1 because everything is.
5 because it ends in 5.
There is no easy rule for divisibility by 34.
By tautology. If it did not work, it would not be a divisibility rule!
why does the divisibility rule work for 4
What is the divisblity rule by 8
there is a divisibility for 24 the rule is you can divide 24 as 6 and 4 i think
There is no easy rule for divisibility by 34.
The divisibility rules of 4 and 9 are combined to make the divisibility rule of 36.
By tautology. If it did not work, it would not be a divisibility rule!
why does the divisibility rule work for 4
the divisibility rule for 2 is: The number is even;the last digit ends with a 2,4,6,8,10, etc.The divisibility rule fir 3 is: The sum of the number is divisible by 3The divisibility rule for 4 is: The last two digits are divisible by 4The divisibility rule for 5 is: The number ends with a 5 or 0The divisibility rule for 6 is: The sum CAN be divisible by 2 and or 3The divisibility rule for 9 is: The sum of the number is divisible by 9The divisibility rule for 10 is : The number ends with a 0
What is the divisblity rule by 8
there is a divisibility for 24 the rule is you can divide 24 as 6 and 4 i think
The divisibility rule for 2 works because the base of our number system, 10, is divisible by 2.
Able to Be Divided
123456789
2.50
Judging by some of the questions asked on this site, the first rule is that divisibility is a concept that applies only to whole numbers.