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Common mistakes made in A-Level exams

We all make silly mistakes when in comes to Maths, so here are some common mistakes to help you out. 1. Partial Fractions: Many students think x+2/(x+1)^2 becomes A/(x+1) + B/(x+1) This is however incorrect,...
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Answered by Calum J. • Maths tutor
5214 Views

Why does inflation decrease but prices continue to go up?

This is a good question and it refers to the difference between deflation and disinflation. Sometimes if inflation is at 2% and it decreases to 1.5% for example, there will still continue to be a general pri...
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Answered by Luke B. • Economics tutor
2590 Views

In the UK 7% of children are privately educated compared with 24% in Japan. Evaluate whether the provision of education should be left solely to market forces.

Reasons why it should be left to market forces: • competition in the provision of education can increase choice. Different types of education may be provided => profit motive could make more educational i...
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8956 Views

Express the number 208 as a) an 8-bit binary number b) an octal string c) a hexadecimal string

Number conversions are a staple of both A-Level and GCSE computing papers. a) Expressing as a binary number is the hardest part of a conversion. Octal and hexadecimal can all come after easily. To express as...
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Answered by Adam M. • Computing tutor
5819 Views

The circle C has centre A (10, 12) and passes through the point B (15, 15). a) Find the length of AB, giving your answer as a simplified surd. b) Hence write down an equation for C in the form (x+c)^2 + (y+d)^2 = r^2.

a) Given two coordinate pairs (x1, y1) and (x2, y2) you can work out the distance AB as sqrt((x1-x2) 2 +(y1-y2) 2 ) - subbing in values gives us sqrt(5 2 +3 2 ) which is equal to sqrt(34) . Despite the quest...
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Answered by Adam M. • ICT tutor
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