Hello KS3 Whizzes! It's time to show off your maths prowess. This quiz revolves around Algebra - Expressions and Equations. So, dust off your mental calculators and dive into these 10 fun puzzles! Remember, it's not just about getting the right answer but also knowing why it's right. Good luck!

1.

Simplify the expression: 3x + 5x

8x

15x

2x

x

When adding like terms, add the coefficients while the variable stays the same. Thus, 3x + 5x becomes 8x.

2.

If 4y = 20, what is the value of y?

5

4

25

24

To find y, divide both sides by 4. Thus, y = 20 ÷ 4, which equals 5.

3.

Simplify: -7t + 10t - 2t

t

5t

-t

15t

Combine like terms: -7t + 10t - 2t yields 1t, or simply t.

4.

If (2x + 3) ÷ 5 = 1, what is the value of x?

1

2

3

4

First multiply both sides by 5 to yield 2x + 3 = 5, then subtract 3 from both sides. Thus, x = (5 - 3) ÷ 2, which equals 1.

5.

What is the solution of this equation: 5r + 4 = 19

1

2

3

4

To find r, subtract 4 from both sides (19 - 4 = 15), then divide by 5. Thus, r = 15 ÷ 5 which equals 3.

6.

Simplify: -2x + 6x - 3x

x

2x

11x

0.5x

Combine like terms: -2x + 6x - 3x equals 1x, or simply x.

7.

Solve the equation: 6m = 18

2

3

12

24

To find m, divide both sides by 6. Thus, m = 18 ÷ 6, which equals 3.

8.

Solve the equation: 9z = 27

2

3

18

36

To find z, divide both sides by 9. Thus, z = 27 ÷ 9, which equals 3.

9.

If 5n + 3 = 23, what is the value of n?

4

5

3

20

To find n, subtract 3 from both sides (23 - 3 = 20) then divide by 5. Thus, n = 20 ÷ 5, which equals 4.

10.

Simplify: 10a - 3a + 5a

15a

10a

12a

18a

Combine like terms: 10a - 3a + 5a yields 12a.

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