Math challenge

Fractions

100

30/50*80/100

12/25

200

2/10*(-12/20)

-3/25

300

(-251/500)+(-45/50)

-701/500

400

2/3*12/22

4/11

500

(25/100*5/10)2-31/50

-967/1600

Ratios

100

There are 9 boys in a class and there are 25 girls in the class. What is the ratio of girls to the whole class?

9/34

200

Solve for X: 40/5=x/80

x=640

300

What is the ratio of boys to girls in the class?

9:25

400

2/10=x/20 

x=4

500

There are 80+2 cows in a barn, there are 20*5 goats in the barn, and there are 40÷20 chickens in the barn. What is the ratio of cows to goats to chickens? Please simplify.

82:100:2

Algebra

100

(2x3)^2

36

200

-2-(-2)

0

300

12+(-6)

6

400

12+14-(-3)+(-7)

22

500

6x4 divided by 12+72 divided by 8 - 9

2

Vernacular

100

LCM of 20 and 10

20

200

GCF of 20 and 10

10

300

Apply PEMDAS and decide the first step to this example: (2+4)^2*3-1

(2+4)

400

The absolute value of -5 is?

5

500

What percent of a chance do you have to get heads when flipping a coin?

50% or 1/2

Geometry

100

Two (parallel/perpendicular) lines would not cross

parallel

200

A 90 degree angle would be considered a (acute/ right/ obtuse) angle.

right

300

When two lines cross it is considered a pair of (parallel/ perpendicular)

perpendicular

400

An angle less than 90 degrees is considered a (acute/ obtuse) angle.

acute

500

An angle between 90 degrees and 180 is a (acute/ obtuse) angle.

obtuse