Grade 6 - Mathematics - Ratio 4

The ratio of the number of boys to the number of girls in a room was 5 : 12.

If the number of children in the room was more than 60 but less than 70,

how many boys were there?

The ratio of the length of a rectangle to the breadth of the rectangle is 3 : 1.

If the perimeter of the rectangle is between 70cm and 80cm,

what is the length of the rectangle?

The ratio of Ester's savings to Hazel's savings was 1 : 3.

After Ester saved another $55 and Hazel saved another $17, their savings became the same.

How much money did they save at first?

The ratio of Tim's money to Dave's money was 4 : 3.

After Tim saved another $12 and Dave spent $12 on a book,

the ratio of Tim's money to Dave's money became 6 : 1.

How much did Tim have at first?

The amount of water in Siti's water bottle was half as much as the amount of water in Fatimah's water bottle.

After Siti drank 50 mL of water, and Fatimah drank 150 mL of water,

the ratio of the amount of water in Siti's water bottle to the amount of water in Fatimah's water bottle became 3 : 5.

How much water did Fatimah have in her bottle at first?

The tickets for a school's mooncake festival celebrations were sold at $4 per child and $7 per adult. $4030 was collected for the celebrations. The ratio of the number of children tickets sold to the number of adult tickets sold was 5 : 6. Find the number of adult tickets sold.