Factors, Multiples and Primes

Sample Factors, Multiples and Primes questions

A few of the 26 questions, from easier to harder. Choose your exam board and tier to practise them, with every answer marked.

1. Question 11 markGrade 1-2
   Write down all the factors of 12.
   Show the worked solution

   Find pairs of numbers that multiply to give 12:

   1 × 12 = 12

   2 × 6 = 12

   3 × 4 = 12

   Factors of 12: 1, 2, 3, 4, 6, 12
2. Question 23 marksGrade 3-4
   Sam is working with 2-digit numbers. She multiplies the digits together to get an answer. For 63, she multiplies 6 by 3, so 63 gives an answer of 18. (a) Write down a different 2-digit number that gives an answer of 18. (b) Write down a 2-digit number that gives an answer of 0. (c) Write down a 2-digit number that gives an answer greater than 70.
   Show the worked solution

   (a) $2 \times 9 = 18$

What are the common mistakes in Factors, Multiples and Primes?

When a pupil makes one of these on Revision Workshop, the marking engine names the mistake and explains it, instead of just marking the answer wrong.

• Lists multiples of a number when factors were asked for, or vice versa

  Wrote down the numbers themselves (or their multiples) rather than their common factors - a factor divides INTO a number, it isn't a multiple of it

• Assumes any odd number must be prime

  151 is actually prime - don't assume a number this size must be composite just because it "looks big"; every prime up to $\sqrt{151}$ must be checked

• Lists the factors of only one number instead of both when finding a common factor

Quick answers about Factors, Multiples and Primes

How many Factors, Multiples and Primes practice questions are there?

There are 26 self-marking GCSE and IGCSE Maths questions on Factors, Multiples and Primes, written for AQA, Pearson, OCR, Pearson International GCSE Maths A (4MA1), Cambridge IGCSE Mathematics (0580), Cambridge IGCSE (9-1) Mathematics (0980) across Foundation and Higher and Core and Extended tier. Each one is marked instantly and has a full worked solution.

Do I need an account to practise Factors, Multiples and Primes?

No. You can start practising Factors, Multiples and Primes straight away without an account. A free account keeps your results across sessions, so you can see your progress on this topic over time.