28 Sept 2020 _ P6 Math Quick Revision

Find the value of   $\frac{85-7a}{4}$  when a = 5. 

Express your answer as a decimal.

Answer: (a)  

Find the value of $\frac{4}{5}\div\frac{3}{7}$  .

•  $\frac{12}{35}$  

•  $\frac{15}{28}$  

•  $\frac{28}{15}$  

A number with 3 decimal places is 7.9 when rounded to 1 decimal place. What is the greatest possible value of this number?

Answer: (a)  

The ratio of the length to the breadth of a cuboid is 3 : 1. The ratio of the height to breadth of the cuboid is 4 : 3. Find the ratio of the length to the height of the cuboid.

Answer: (a)  

The graph shows the amount of money collected by 3 classes for a charity.

What was the total amount of money collected by the 3 classes?

Answer: $ (a)  

The receipt below shows the cost of 3 dresses Mrs Koh bought. The cost of Dress C was 20% of the total cost of the 3 dresses. Find the total cost of the 3 dresses.

Answer: $ (a)  

In the figure, ABC, CDE, EFC and CGA are identical isosceles triangles. ∠ ABC = 38º and ∠BCD = 43º. Find ∠GCF.

Answer: (a)     $\degree$  

The average of three different 2-digit numbers is 30. Find the largest possible sum of two of the numbers.

Answer: (a)  

Find the value of 750 ÷ 8.

• 9.375

• 9.875

• 93.75

• 98.75

The price of a car was increased by 20% to $120 000. How much was the original price of the car?

• $80 000

• $100 000

• $150 000

• $600 000