Algebraic Expressions
Find unknown value
Area
Perimeter
Mean, median and mode
100
Three times a number minus seven

3x-7

100

2x=80

x=40

100

A field has a height of 30 meters and a base of 20 meters. What's the area?

600 meters ^2

100

A triangular frame has equal sides of 17 cm each, what's the perimeter?

51 cm

100
An interview with several families about the number of children had the following results: 

2, 3, 4, 2, 1, 2, 1, 2, 2, 2. What's the mode?

2

200

The quotient of twenty-six and twice a number

26รท2x

200

10y=5

y=0.5

200

A triangular pool has a base of 3 meters and a height of 2 meters, what is the area?

3 meters

200

A square has sides measuring 6.5 cm each, what's the perimeter?

26 cm

200

A 6th grade classroom recorded the following ages: 

11, 12, 11, 10, 12. What is the median age?

11

300

The product of six and a number, divided by twenty

6x/20

300

24n+6=54

n=2

300

A cup has a circular base with a radius of 3 cm. What is the area?

28.27 square cm

300

A cup has a circular base with a diameter of 10 cm. What is the base circumference?

31.416 cm

300

Multiple runners recorded the following times in minutes for a race:

25, 31, 30, 28, 42, 21, 40, 39. What is the median?


30.5 min

400

The sum of twice a number squared and the product of another number and seven

2x2+7y

400
11x+1=9x+19

x=9

400

A garden with grass has the form of a square with sides measuring 15 meters each. If there's a fountain with a radius of 2 m in the middle, what is the area of the garden with only grass?

212.43 meters

400

A window has a circular form, with a radius of 31.5 cm, what's the circumference?

197.92 cm

400

A clinic recorded the following weights in kilograms for children:

9, 12, 15, 11, 10, 10. What's the average weight?

11.16 kilograms

500

The quotient of ten times a number and another number times six, minus two

(10x/6y)-2

500

-4z-10=2z+62

z=-12

500

A field has a height of 25 meters and a base of 10 meters. If there are two semi-circles on the sides of the width, what's the area of the whole field?

328.54 square meters

500

An irregular polygon has two sides measuring 3 units, ten sides measuring 1 unit, seven sides measuring 9 units and one side measuring 13 units. What is the perimeter?

92 units

500

Several kids were asked about their daily screen time in minutes. The results were:

45,93,182,90,30,35,231. What is the average?

100.86 minutes

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