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GCSE Trial & Improvement Questions - easy when you know how.

Updated: Apr 18

In ‘trial & improvement’ questions, there are steps you can use to guarantee full marks. The idea is to gradually zero in on a reasonable answer. A methodical approach is needed to gain a relatively easy 4+ marks.

Let’s look at an example…

Using the following equation, find a solution for x using a trial and improvement method

Give your answer to 1 decimal place.

To maximise your marks, you need to show step -by-step reasoning.

First, draw a table like this…

For x values, you are looking for two consecutive numbers between which the target number lies... We'll try x = 2 and 3