Write 825 as a product of its prime factors.

Prime factors are numbers that can only be fully divided by itself and 1.

For example, 2, 3 and 5 are prime numbers since they can only be divided by itself and 1. However, 6 is not a prime number because it can also be divided by 2 and 3.

Is it easy to see that 825 can be divided by 5 (a prime number). Doing this gives us 165.

Once again, 165 can be divided by 5! The result is 33.

33 can be divided by 3, giving us a quotient of 11.

11 can not be divided by any integer other than itself and 1, and so is a prime number in itself.

Therefore, 825 can be expressed as 1155*3 or, in a simplified format, 11 * 5^2 * 3

EV
Answered by Ewan V. Maths tutor

20045 Views

See similar Maths GCSE tutors

Related Maths GCSE answers

All answers ▸

How do I solve a quadratic equation: x^2-5x+6=0


Ian's commute to work is 5km. He needs to be there by 9.00am. He travels at 10 km/h, what time does he need to leave home?


i) Factorise x^2 – 7x + 12 ii) Solve x^2 – 7x + 12


Work out 2 7/15 -1 2/3


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2026 by IXL Learning