Mental Math
Percents
Fractions
Area
Math Riddles
100

20 x 8

160

100

What is 50% of 200?

100

100

Turn this into a mixed number

34/3

11 1/3

100

What is the area of a square with a side length of 4 cm?

16 cm squared

100

There are seven apples, and you take away three. How many do you have?

3 apples

200

100 divided by 4

25

200

What is 25% of 1000

250

200

Turn this into an improper fraction

2 3/4

11/4

200

What is the area of a rectangle with side lengths of 4 inches and 10 inches?

40 inches squared

200

How many sides does a circle have?

2 - the inside and the outside

300

(40 x 2) + 9

89

300

3 apples out of the 15 total pieces of fruit is what percent?

3/15 = 20%

300

Multiply

1/3 x 5/6

5/18

300

What is the area of a parallelogram with a base of 12 inches, a height of 5 inches, and a slant height of 3 inches?

60 inches squared

300

A phone and case cost $110 total. The phone costs $100 more than the case. How much is the phone?

Phone is $105 and the case is $5

400

(15-5) x 1 +3

13

400

80% of what number is 80?

100

400

Divide

2/5 by 1/2

4/5

400

What is the surface area of a cube that has a side length of 6 inches?

216 inches squared

400

I am a number, but when you add ā€˜g’ to me, I go away. What number am I?

ONE

(gONE)

500

15 x (9-6) +4

49

500

75% of what number is 60?

80

500

Divide

2 1/3 by 1 3/8

56/33 = 1 23/33

500

What is the surface area of a rectangular prism with side lengths of 2 cm, 4 cm, and 8 cm?

112 cm squared

500

On a farm, there are ducks and cows. There are 18 legs and 7 heads in total. How many ducks are there?

5 ducks and 2 cows.

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