A divisibility rule is a shortcut method used for finding if a number is divisible by a fixed divisor. Below is the Divisibility Rule for 25 to find whether a number is divisible by 25. The rule is illustrated with clear examples for easier understanding.
The last two digits of the number ends with 00 or multiples of 25 .
If last two digits are divisible by 25, then the original number is also divisible by 25.
Apply this rule over and over again as necessary.
Let us consider the number 7800 and find if it is divisible by 25.
Applying the divisibility rule for 25,
Here, last two digits are 0. Therefore, the number is divisible by 25
(i.e) 7800 / 25 = 312
Now, it is clear that 7800 is divisible by 25
Let us consider the number 9850 and find if it is divisible by 25.
Here, last two digits is 50 (i.e) a multiple of 25 (25 x 2 = 50) Therefore, the number is divisible by 25
(i.e) 9850 / 25 = 394
Now, it is clear that 9850 is divisible by 25