21. Do you know the answer to this one?

2³ = ?

• 2
• 4
• 6
• 8

22. Do you know the answer to this question?

What is 2648 to two significant figures?

• 2600
• 2640
• 2650
• 2700

23. Can you answer this question?

Which of these is 3% equivalent to?

• 0.003
• 0.03
• 0.3
• 300

24. What is the answer here?

-5 x -6 = ?

• -90
• -30
• 30
• 90

25. How many triangles can you count?

• 10
• 12
• 14
• 16

26. What does ‘X’ equal here?

150 – x = 87

• 53
• 57
• 63
• 67

27. What is ‘Y’ equivalent to?

90 x Y = 450

• 5
• 6
• 7
• 8

28. Tell us which digits have been replaced by question marks in this sum.

?1 – 2? = 34

• 4, 5
• 5, 6
• 6, 7
• 8, 9

29. Calculate the correct answer to this equation.

16.72 x 5 = ?

• 81.5
• 83.6
• 87.1
• 91.3

30. Do you know the answer to this conundrum?

√324 = ?

• 16
• 18
• 20
• 22