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Summary O/L Maths Revision Guide
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This is a booklet which summaries O/L Maths
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, 1. NumbersWhen Adding And Subtracting Numbers…
SAME SIGN – Add both and put the biggest number’s sign
DIFFERENT SIGN – Subtract the smallest from the biggest and put biggest number’s sign
When Multiplying And Dividing Numbers…
REMEMBER!
SAME SIGN – Always put (+)
B – Brackets
DIFFERENT SIGN - Always put (-) O – Of
LCM And HCF D – Division
LCM – Multiplication of the highest powers of each M – Multiplication
number. A – Addition
HCF – Multiplication of lowest powers of common S - Subtraction
numbers.
Prime Numbers (1 – 300)
2, 3, 5, 7, 11, 13, 17, 19, 23, 29, 31, 37, 41, 43, 47, 53, 59, 61, 67, 71, 73, 79, 83, 89, 97, 101,
103, 107, 109, 113, 127, 131, 137, 139, 149, 151, 157, 163 ,167, 173, 179, 181, 191, 193, 197,
199, 211, 223, 227, 229, 233, 239, 241, 251, 257, 263, 269, 271, 277, 281, 283 and 293.
π , square root of
2,3, 5, 7 and cube
root of 3.
Repeating
Terminating Decimals
Ex- 1/3 Decimals
0.33333…
2/3 0.15297
1.271271..
-1, -2, -5, -11
0 1, 3, 5, 9, 20, 1000…
, 10 Rationals 10 Irrationals Square Numbers
Cubic Numbers
0.02 √2 1 1
9.12 √3 4 8
1
1 √7 9 27
2
1
3 √5 16 64
3
2.190 3√3 25 125
½ π 36 216
1/3 0.19726109823… 49 343
2.18001239 19.01921930610… 64 512
3.3333… √10 81 729
2. Sequence
1. Equal gap number pattern
n th term = first number + gap (n – 1)
2. Different gap number pattern (Can ONLY apply when difference between the terms are
SAME)
Ex – 6, 9, 14, 21… 3. Ex – 2, 6, 12, 20…
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