Using algebra (Edexcel GCSE Maths): Quizzes

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Using algebra
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10 questions from this quiz

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What is the first step when setting up equations from word problems?

Choose a letter to represent an unknown

After defining your variable, what should you do next?

Write expressions for other unknowns

Cards A, B, C: B has twice A, C has A+5A+5. If A+B+C=37A+B+C=37, what is A?

8

If card A has 8, and card C has five more than A, what is C?

13

What does substitution mean in algebra?

Replacing variables with actual numbers

What is a counter-example?

A value making a statement incorrect

How many counter-examples are needed to prove a statement is false?

One

For 2n2+32n^2 + 3, which value proves it's not always prime?

n=3n = 3 gives 21

What is the formula for the perimeter of a rectangle?

2×(length+width)2 \times (\text{length} + \text{width})

Why should you always check your solutions?

To verify conditions are satisfied

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