- Books Name
- CBSE Class 6 Mathematics Book

- Publication
- Param Publication

- Course
- CBSE Class 6

- Subject
- Mathmatics

**Some More Divisibility Rules**

**(i)** If a number is divisible by another number then it is divisible by each of the factors of that number.

**Ex.** 18 is divisible by 9. The factors of 9 is 3. 18 is also divisbile by 3.

**(ii) ** If a number is divisible by two co-prime numbers then it is divisible by their product also.

**Ex. ** The number 80 is divisible by 4 and 5. It is also divisible by 4 × 5 = 20, and 4 and 5 are

co-primes.

Similarly, 60 is divisible by 3 and 5 which are co-primes. 60 is also divisible by 3 × 5 = 15.

**(iii) ** If two given numbers are divisible by a number, then their sum is also divisible by that number.

**Ex.** The numbers 16 and 20 are both divisible by 4. The number 16 + 20 = 36 is also divisible by 4.

**(iv) ** If two given numbers are divisible by a number, then their difference is also divisible by that number.

**Ex.** The numbers 35 and 20 are both divisible by 5. Is their difference 35 – 20 = 15 also divisible by 5.