Math quiz Y9

Algebra

1000

x-3+x=0   

What is x?

x=1.5

3000

3.1x10⁶ + 1.56x10⁷

1.89x10⁷

Probability

1000

You have a bag with 5 red marbles and 20 black marbles.

what is the chance you get a red marble in percent?

20%

Geometry

2000

a right angle triangle has one angle that is 69°, what is the unknown angles

21°

3000

the scale is 1:4, the smaller square is 4 cm². How big is the big square in cm²?

64cm²

5000

The height of an isosceles triangle is 8 cm, the base is 12 cm. What is the perimeter?

32cm

Percent

1000

write 1/8 in percent

12.5%

free points

3000

1.6-3.4

-1.8

4000

the pattern is 2 6 14

What is the function?

8-4=4/2=2 1x2²=4-2=2

                  2x2² =8-6=2

                  3x2² =16-14=2

2n²+2n²+c