Topic 8 - Numbers

Question 1

what is a number express in prime numbers?

Answer 1

the prime numbers that x together to make that number

Question 2

list the first 7 prime numbers

Answer 2

2, 3, 5, 7, 11, 13, 17

Question 3

what does a number in standard form be?

Answer 3

between 0 and 9

Question 4

list the first 7 square numbersd

Answer 4

1, 4, 9, 16, 25, 36, 49

Question 5

what does rationalising mean?

Answer 5

get rid of any surds from the bottom of a fraction

Question 6

when simplify surds you always

Answer 6

have a square number and the number used to x it to get to the original number

Question 7

what is:
the highest common mutiple
the lowest common multiple
e.g. Find the HCM and LCM of 30 and 45.

Answer 7

= the small numbers (that appear in both big numbers) x together (how many times it appears in both numbers)
= all of the prime number of both numbers x together. however, they have a common number, you only add it to the sum once.

e.g. prime factors of 30 = 2, 3, 5
prime factors o 45 = 3, 3, 5
HCM = 3 x 5 = 15
LCM = 2 x 3 x 3 x 5 = 90

Question 8

How do you get the final outcome on a stem and leaf diagram?

Answer 8

You x across

Question 9

What do you do if you get given a piece of text and you have to write a conclusion on it?

Answer 9

Say what this actually means

Question 10

What do you have to do when you have to find a number that equals something and has a certain number distance between them?

Answer 10

x + y = total

x - y = difference between