Ratios

Ratios

Open Ended

The ratio of the number of men to the number of women to the number of children at a concert was 3:5:2. If there were 360 more aduilts thna children, how many people were at the concert?

Open Ended

The ratio of the number of pencils to the number of pens is 3:2. the ratio of the number of pens to the number of rulers is 5:4. If there are 150 pencils and pens altogether, how many rulers are there?

Open Ended

Simones's age is 4/5 her sister's age.

a) What is the ratio of her sister's age to Simone's age?

b) What is the ratio of the difference between their ages to the total age of both girls?

Open Ended

The sides of a triangle are in the ratio 3:4:5. If the side of the triangle is 40cm longer than the shortest, find the perimeter of the triangle.

Open Ended

Anita and Winnie share some oranges and lemons in the ratio 5:7. The number of oranges and the number of lemons that Anita has is in the ratio 3:5. If Anita has 30 few oranges that lemons, how many oranges and lemons does Winnie have altogether?

Open Ended

A rectangular metal block measures 30 cm long, 28 cm wide and 20 cm thick. It is made of copper and zinc in the ratio 7:3 by volume. If 1 cm³ of copper has a mass of 7.6 g and 1 cm³ of zinc has a mass of 6.5 g, find the mass of the metal block. Round off your answer to the nearest kg.

Open Ended

There were 64 boys and girls at a party. After an hour, 24 boys left and 30 more girls came to the party. The ratio of the number of boys to the number of girls at the party then became 2:5. How many boys were there at first?