Year 9 Maths Revision

x + 9 = 18 + -2x

• 5
• 2
• 3
• 4

Solve for x.
3x + 2 = 6x - 7

• x = 9
• x = 3
• x = -3
• x = 7

Which equation has x =2 as a solution?

• 3 + x = 10
• 11 + x = 13
• 4x = 32
• 5x =25

Identify the outlier for the given data?
23, 34, 27, 7, 30, 26, 28, 31, 34

• 7
• 23
• 31
• 34

How would you write 564,000,000 in scientific notation?

• 5.64 x 10^-7
• 5.64 x 10⁶
• 5.64 x 10⁸
• 56.4 x 10⁷

How would you write 4.3756 x 10⁴ in standard form?

• 437,560,000
• 0.00043756
• 43,756
• 4,3756

How would you write 0.0005 in scientific notation?

• 50 x 10⁵
• 5 x 10⁴
• 5 x 10³
• .5 x 10³

Find the mean of these numbers:
5,11,2,12,4,2

• 4.1
• 6
• 4.5
• 4

Find the median of these numbers:
2, 57, 38, 42, 6, 16

• 29
• 27
• 55
• 38

What is the algebraic expression for                  "the sum of n and 9"?

• n - 9
• n + 9
• n/9
• 9n