7th Grade Math Academic Olympics

Front

What is a proportional relationship?

Back

A proportional relationship is a relationship between two quantities where the ratio of one quantity to the other quantity is constant.

Front

If the diameter of a circle is 16 cm, what is the length of its radius?

Back

8 cm

Front

What is the formula for the circumference of a circle?

Back

Circumference = 2πr, where r is the radius.

Front

What is 15% of $120?

Back

$18

Front

What is the equation for the total cost of a taxi ride that charges a base fare plus a per-mile rate?

Back

y = mx + b, where m is the cost per mile and b is the base fare.

Front

What is the radius of a circle with a diameter of 10 cm?

Back

5 cm

Front

How do you calculate the area of a circle?

Back

Area = πr², where r is the radius.

Front

What is the relationship between miles and gallons in terms of fuel efficiency?

Back

There is a proportional relationship; as miles driven increases, gallons used increases at a constant rate.

Front

If a jacket costs $120 and you save 15%, how much do you save?

Back

$18

Front

What is the circumference of a circle with a radius of 6 inches?

Back

12π in