Chap 1 - number concepts

Question 1

different number groups

Answer 1

-imaginary
-real: - irrational, rational- integer, whole, natural

Question 2

define natural numbers

Answer 2

-positive whole numbers from 1 to infinite
-no include 0

Question 3

define integer

Answer 3

-any positive/ negative whole number
-including 0

Question 4

define odd

Answer 4

-number that cannot be exactly divided by 2

Question 5

define even

Answer 5

-number that can be exactly divided by 2

Question 6

define prime numbers

Answer 6

-whole numbers with itself and 1 as its factors

Question 7

define indices

Answer 7

number that can be put in power

Question 8

define square number

Answer 8

-product of number multiplied by itself

Question 9

define rational numbers

Answer 9

-numbers that can be put in fractions

Question 10

define irrational numbers

Answer 10

-numbers that cannot be put in fractions

Question 11

define fraction

Answer 11

-no. that represents part of a whole

Question 12

what is HCF

Answer 12

-highest common factor btw no.s

Question 13

what is LCM

Answer 13

-Lowest common multiple btw no.s

Question 14

how to express prime numbers as products of its prime factors

Answer 14

-use division
2| 4
2| 1
-use factor tree

Question 15

what does > mean

Answer 15

big> small

Question 16

what does < mean

Answer 16

small< big

Question 17

what is the order of brackets

Answer 17

( ), [ ]

Question 18

order of operations

Answer 18

-left to right
-brackets/ expand
-divide/ multiply
-add/ minus

Question 19

rounding no.s

Answer 19

-nearest whole no.
-1 dp
-2 dp
-3 sf- 1sf is non-0 number

Question 20

how to find LCM

Answer 20

-do prime factorisation
-same no.s will be written once & times with other no.s