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# GCSE Maths - Edexcel Higher course book - Exercise 1C - Question 2 (page 10) watch

1. Can anyone tell me the best approach to this question:

a - b ÷ c = d

The numbers used are 9, 11, 13, 18

You have to arrange the numbers and add any brackets to make the sentence true.

I have the answer, but if you had this in an exam how would you approach this to get the answer quickly?
2. (Original post by AJVarey)
Can anyone tell me the best approach to this question:

a - b ÷ c = d

The numbers used are 9, 11, 13, 18

You have to arrange the numbers and add any brackets to make the sentence true.

I have the answer, but if you had this in an exam how would you approach this to get the answer quickly?
I worked out the division first by planting in the numbers which would divide to produce whole numbers. If in the GCSE you don't get a whole number, you know you will have to put brackets in a and b to then divide by c to produce a whole number.

(Original post by wills21)
I worked out the division first by planting in the numbers which would divide to produce whole numbers. If in the GCSE you don't get a whole number, you know you will have to put brackets in a and b to then divide by c to produce a whole number.

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Updated: February 10, 2018
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