Chapter 1 + 2 【 Common factors + Real Numbers 】 Flashcards
1
Q
HCF
A
Take out lowest common only
2
Q
LCM
A
Take out highest common + uncommon
3
Q
Perfect square / cube
A
When a number is a multiple of 2 /3
4
Q
Intergers
A
Numbers with no fractional part :
2, 1, 1.5, 0, 1, -2, 2.5
5
Q
Prime numbers
A
Numbers with only 2 factor :
1 + number itself
6
Q
Composite numbers
A
Numbers with more than 2 factors
7
Q
Reciporal
A
Inverse of a number :
5 ( 5/1 ) = 1/5
1/2 = 2/1
8
Q
Rational numbers
A
- Can be expressed in fractions
- fractions must be whole number
- terminating / recurring decimals
- whole numbers :
1 = 1/1 2 = 2/2
9
Q
Terminating decimal
A
Finite numbers
10
Q
Recurring decimal
A
- do not terminate ( keep going )
- digits repeat in pattern
11
Q
Irrational numbers
A
Cannot be expressed as simple fraction
12
Q
Pie
A
Irrational number
