Final Math Grade 8

Fifteen children were asked how many pieces of fruit they had eaten during the last week, with the following results.

17, 7, 3 ,12, 20, 6, 0, 9 ,1, 15, 0, 4 ,11, 18, 6.

Find the inter quartile range.

• 3

• 7

• 12

• 15

Find the median of the following set of discrete data.

5, 5 ,0 ,1, 1, 1, –3, –7, 5, 6 .

• 1

• -1.5

• 5

• -3

What is the median length?

• 40.5 cm
• 30 cm
• 24.5 cm
• 32 cm

Tags

CCSS.6.SP.A.1

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

What is the interquartile range?

• 42

• 73

• 50

• 31

Tags

CCSS.6.SP.A.1

CCSS.6.SP.A.2

CCSS.6.SP.A.3

CCSS.6.SP.B.5

Estimate the shaded area.

•  $80cm^2$  

•  $24cm^2$  

•  $64cm^2$  

•  $68cm^2$  

The length and width of a field have been measured as 78m and 35m to the nearest meter. Find the greatest possible amount of fencing(perimeter) needed to surround the field.

• 27

• 228

• 226.5

• 228.5

The sides of the rectangle are measured to the nearest cm. What is the largest area of the rectangle?

• 15 cm²

• 19.3 cm

• 19.25 cm²

• 11.25 cm²

Calculate, giving your answers correct to 3 s.f. $\frac{\sqrt{2.5\times10^4}}{5.2\times10^{3\ \ }-1.5\times10^2}$  

•  $-1.49\times10^2$  

•  $3.13\times10^{-2}$  

•  $9.9\times10^{-3}$  

•  $4.27\times10^{-2}$  

Expand and simplify this expression.

(x + 1)(3x – 2)(x – 1)

• $3x^{3\ }-2x^2-x-4$

• $3x^{3\ \ }-2x^2-3x+2$

• $3x^{3\ }-2x^2+3x-2$

• $3x^{3\ }-2$

If you square 5 more than a positive number, the result will be 88 more than 12 times the number. Find the number.

• 7

• -7

• 9

• -9