Algebra and Equations

Quiz by Molly Edmonds

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8 questions
• Q1

Match each expression to its reduced form

300s
• Q2

A goldsmith melted a gold bar weighing 3 kg with 80 % purity, along with another gold bar weighing 1kg. The resulting mixture is 67 % pure. What was the purity of the second bar?

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300s
• Q3

A car takes 5 hours to travel from A to B. A truck left at the same time and is travelling from B to A. It takes 2 hours and 55 minutes for the truck to cross paths with the car. How long will the truck’s full journey take?

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300s
• Q4

Solve this equation: 1 = 3 – 4x

x = 1

x = $\frac\left\{1\right\}\left\{2\right\}$

x = 3

x = $\frac\left\{2\right\}\left\{3\right\}$

120s
• Q5

Solve: (2x + 1)2 = 0

x = -$\frac\left\{1\right\}\left\{2\right\}$

x = $\frac\left\{1\right\}\left\{2\right\}$

x = -2x2

x = 3x2

120s
• Q6

Ian is 25 years younger than his father. In 10 years, his father’s age will be double Ian’s age. How old are they?

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120s
• Q7
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