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Brain Teaser!

Total questions: 18

Worksheet time: 23mins

Name
Class
Date
1.

-2 x -2 x -5

a)

20

b)

60

c)

71

d)

13

2.

A tank has 30,000 litres of water and 1,000 litres are taken out every day. What was the amount of water in the tank 3 days ago.

a)

42,000 litres

b)

21,000 litres

c)

33,000 litres

d)

55,000 litres

3.

Add the Mean and Median then, minus it from the range of the following set of numbers;

2 + 2 + 5 + 6 + 7 + 8

a)

8.9

b)

3.5

c)

10.5

d)

4

4.

(2x4y-3)(4x-2y6)

a)

8x5y

b)

8x3y2

c)

8xy

d)

8x2y3

5.

(2/3)-2

a)

2 1/4

b)

3 5/7

c)

4 7/9

d)

5 9/11

6.

Add 134.64 to 0.034, leave your answer in standard form.

a)

0.13467 x 102

b)

1.3467 x 102

c)

13.467 x 102

d)

134.67 x 102

7.

The angle of a triangleare in the ratio 2:3:4, fin the size of the third angle

a)

20.

b)

40.

c)

60.

d)

80.

e)

Note . signifies degrees

8.

Which Pythagoras triple is correct ?

a)

132 = 122 + 52

b)

22 2 = 122 + 52

c)

132 = 22 + 52

d)

1 2 = 22 + 142

9.

Which formula is correct

a)

I = P X R X T / 200

b)

P = (100)I / R X T

c)

R = (11)P / 100 X T

d)

T = (P X R) / 100 X I

10.

What is the ratio for Tangent

a)

Opp/Adj

b)

Adj/Opp

c)

Opp/Hyp

d)

Hyp/Opp

11.
What is the correct ratio?
a)
7/24
b)
24/7
c)
7/25
d)
24/25
12.

 1 \angle1\   and  2\angle2  are ___.

a)

Alternate Interior Angles

b)

Alternate Exterior Angles

c)

Same-side Interior Angles

d)

Corresponding Angles

e)

None of these

13.

 8\angle8  and  6\angle6   are __.  

a)

Alternate Interior Angles

b)

Alternate Exterior Angles

c)

Same-side Interior Angles

d)

Corresponding Angles

e)

None of these

14.

How many quadrilaterals makes up this shape person?

a)

1

b)

5

c)

7

d)

8

15.

The right triangles have what in common?

a)

one 90 degree angle

b)

all sides are equal

c)

polygon

d)

triangle

16.
What is the SUM of the angle measures in a triangle (3 sides)?
a)
60°
b)
90°
c)
120°
d)
180°
17.
Find the measure of the missing angle.
a)
90o
b)
100
c)
130o
d)
50o
18.
Solve for x.
a)
5
b)
12
c)
-7
d)
-6