Maths

Question 1

What is an “exponent” in maths?

Answer 1

An exponent refers to the number of times a number is multiplied by itself. Little number that floats up to the right.

Question 2

A logarithm is…

Answer 2

How many of one number do we multiply to get another number? Example: How many 2s do we multiply to get 8? Answer: 2 × 2 × 2 = 8, so we had to multiply 3 of the 2s to get 8 So the logarithm is 3 We write “the number of 2s we need to multiply to get 8 is 3” as: log2(8) = 3

Question 3

Area of circle

Answer 3

2πR

Question 4

What is difference between discrete and continous

Answer 4

Discrete data is counted, Continuous data is measured

Question 5

10 sided shape is

Answer 5

Decagon

Question 6

9 sided shape is

Answer 6

Nonagon

Question 7

7 sided shape is

Answer 7

Heptagon

Question 8

Rhombus

Answer 8

2 lines of symmetry e.g. a diamond

Question 9

Parallelogram

Answer 9

No lines of symmetry

Question 10

Trapezium

Answer 10

In the UK a shape with four sides, where two of the sides are parallel; e.g. a car window in the US a shape with four sides, where no sides are parallel

Question 11

Concave polygon

Answer 11

If any internal angle is greater than 180° then the polygon is concave

Question 12

Scalene triangle

Answer 12

no equal angles or equal sides

Question 13

Numbers that aren’t primes

Answer 13

composites

Question 14

What is a prime factor?

Answer 14

Factors that happen to be primes

Thus they can’t be broken down any further

Question 15

Improper fraction

Answer 15

is where the numerator is bigger than the denominator. E.g. 8/5

Question 16

Multiplying fractions by whole number

Answer 16

Just multiply the numerator e.g. 2/5 x 2 = 4/5

Question 17

Multiply fractions by other fractions

Answer 17

Question 18

If you want to add subtract fractions

Answer 18

first get the denominator the same

Question 19

To divide a fraction by a whole number

Answer 19

Multiply the bottom bit

Question 20

1/6 in decimals is

Answer 20

0.16r

Question 21

1 inch is

Answer 21

2.54cm

Question 22

1 lb is

Answer 22

454g

Question 23

1 pint is

Answer 23

568ml

Question 24

1 mile is

Answer 24

1.6km

Question 25

tetrahedron

Answer 25

Triangle based pyramid = tetrahedron, 4 faced shape

Question 26

octahedron

Answer 26

8 sided die, polyhedron with eight triangle faces, looks like 2 pyramids stuck together

Question 27

dodecahedron

Answer 27

12 faces, lots of pentagons stuck together

Question 28

icosahedron

Answer 28

20 faces, lots of triangles stuck together