- Books Name
- CBSE Class 6 Mathematics Book
- Param Publication
- CBSE Class 6
When a number is expressed as a product of its factors we say that the number has been factorised. Thus, when we write 24 = 3×8, we say that 24 has been factorised. This is one of the factorisations of 24. The others are :
Such a factorisation of a number is called a prime factorisation.
Ex : Find the prime factorisation of 980.
Sol.: We proceed as follows:
We divide the number 980 by 2, 3, 5, 7 etc. in this order repeatedly so long as the quotient is divisible by that number.Thus, the prime factorisation of 980 is 2 × 2 × 5 × 7 × 7.