Advertisements
Advertisements
Question
Determine if 25110 is divisible by 45.
[Hint: 5 and 9 are co-prime numbers. Test the divisibility of the numbers 5 and 9].
Advertisements
Solution
45 = 5 × 9
Factors of 5 = 1, 5
Factors of 9 = 1, 3, 9
Therefore, 5 and 9 are co-prime numbers.
Since the last digit of 25110 is 0, it is divisible by 5.
Sum of the digits of 25110 = 2 + 5 + 1 + 1 + 0 = 9
As the sum of the digits of 25110 is divisible by 9, therefore, 25110 is divisible by 9.
Since the number is divisible by 5 and 9 both, it is divisible by 45.
RELATED QUESTIONS
Find the quotient when 94 – 49 is divided by 5
Find which of the following numbers are divisible by 5 :
(i) 3250
(ii) 5557
(iii) 39255
(iv) 8204
We say these numbers are the multiples of 3.
Play the game by changing the number to 4.
- Now, which numbers did you replace with ‘Meow’?These numbers are the multiples of 4.
- Write any ten multiples of 5 ____________
A four-digit number aabb is divisible by 55. Then possible value(s) of b is/are ______.
A three-digit number abc is divisible by 5 if c is an even number.
According to the divisibility rule, a number is divisible by 5 if its unit’s digit is:
If the number cba is divisible by 5, what must be true about the digit a?
If the number 20x is divisible by 5, which values can x take?
Which of the following numbers is NOT divisible by 5?
Which of the following numbers is divisible by 5?
