# Maths

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## 1. What is direct proportion?

• When two quantities are in direct proportion, as one increases, the other increases by a perentage of 10 always.
• When two quantities are in direct proportion, as on inreases, the other increases by the same percentage.
• When two quantities are in direct proportion, as one decreases, the other increases by the same percentage.
• When two quantities are in direct proportion, as one increases, the other decreases by a percentage of 10 always.
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## 2. What is formulae?

• A method or procedure for acheiving something.
• A method to procedure.
• Something that has a formula.
• A formula.

## 3. What does ' Trial and Improvement' involve?

• This involves substituting the unknown with different values, until we find one that works.
• This involves substituting the unknown with different values, until we find five that works.
• This involves substituting the known with the same values, until we find one that works.
• This involves substituing with the unknown with the same values, until we find two that works.

## 4. What is an simultaneous equation?

• Finding 3 unknown values by solving 3 equations at the same time.
• Finding 3 unknown values by solving 1 equation.
• Finding 2 unknown values by solving 2 equations at the same time.
• Finding 1 unknown value by solving 2 equations at the same time.

• C2 + B2=A2
• A2 + B2=C2
• B2 + C2=A2
• C2 + A2=B2