## Another maths quiz

Another quick test. I use these at the beginning of each lesson to give practice in working under test conditions, to soak up the latecomers (inevitable in Adult Learning classes whatever OFSTED inspectors may think), and to ‘tune’ people in to the topic we were looking at in the last lesson. I show the answers on an OHP or projector after the 10 minutes and students mark their own work.

This quiz covers HCF, LCM, prime factors and using prime factors to find the HCF and LCM (I present that one with a Venn diagram although I don’t explain the set theory ideas as they are, alas, not on the syllabus these days).

## GCSE Maths Quiz 2

Try these without the calculator

1. Find the prime factors of 12 and 18
2. Find the prime factors of 78 and 96
3. Find the highest common factor of 12 and 18 using the prime factors (remember the intersecting circles)
4. Find the lowest common multiple of 78 and 96 using the prime factors. You will definitely want to use the prime factor methods!
5. Find the highest common factor 78 and 96 using the prime factors
6. Find the lowest common multiple of 12 and 18
7. Find the square root of 144
8. Write down the square roots of 25 and 64
9. Use surds to find the square root of 32, leave your answer in the form of a number times a square root of a prime number
10. Use surds to find the square root of 75 again in the form of a number times the square root of the prime number