Ch2 Crunching Numbers

6 + 4 × 2 =

• 10
• 8
• 24
• 14

An 18-carat gold chain is made from 18 parts pure gold to every 6 parts alloy. If the chain weighs 120g, how many of pure gold does it contain?

• 90g
• 100g
• 60g
• 30g

• 33

• 120

• 101

• 132

• 5.2
• 5.23

• 5.0

• 5.3

Jess is bottle feeding a lamb. The lamb requires 800mL of formula each day spread over 6 feeds. How many millilitres (mL) should Jess put in each bottle, correct to one decimal place?

• 100.0

• 133.3

• 480.0

• 148.8

• 10

• 24
• 75

• 56

72 ÷ _ = 9

• 12

• 8

• 15
• 6

The number of children in a daycare center increased from 60 to 75. What percentage increase is this?

• 10%
• 15%

• 25%

• 40%

In the last 2 months the price of treated pine has increaed by 30% per metre. If it was $5.20 per metre before the price rise, what is the new cost per metre?

• $4.50
• $6.76
• $7.80
• $6.00

Calculate the average of the following list of numbers correct to one decimal place;

24.8, 36.4, 19.3, 32.5, 29.7, 30.3

• 25.5
• 27.6

• 31.2
• 28.8