📖Definition
In these questions you'll be asked to work out sums where the numbers have been replaced by letters. Once you've calculated the answer as a number, see which letter represents it and write/choose that as your answer.
✏️Example
A = 2, B = 3, C = 4, D = 7, E = 10
A x D - E = ( ? )
Knowledge Required
Knowing your times tables thoroughly will help with this topic. Also, practise your mental arithmetic - it'll help you get through these questions faster in the exam.
✅How To Answer
These questions are very straightforward you just have to be careful. Make sure you substitute the correct number for each letter and then, working from left to right, break the sum down into steps and work each step out one at a time.
First, substitute the numbers for the letters.
The sum becomes:
2 x 7 - 10 = ( ? )
Working from left to right:
2 x 7 = 14
Put that in the sum.
14 - 10 = 4
We need to find the letter that represents 4. It's C, that's the answer.
If you find your answer doesn't have a number to represent it, something's gone wrong. Go back through the sum and see if you can find the mistake.