number_pattern_studentonline.pdf  
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Introduction (Page 1)
Walking through on how to find the actual formulas for the following basic Number Patterns using the 'Guiding' formulas: Common Difference and Group Common Difference  Square Numbers (Sum of consecutive ODD numbers)  Triangular Numbers (Sum of consecutive numbers)  Numbers with 0, 2, 6, 12, 20, 30, ... 

Q2 (Common Difference)
Parallel line > Q1 

Q4 (Square numbers and Numbers involving 2, 6, 12, ..)
Mystery on how the formula n x (n+1) is derived for numbers 2, 6, 12, 20, ... is revealed in this video! Tips: Study the given patterns! Do Q12. You can try Q13 before watch the video! :) 

Q5 (Square Numbers)
This video will show you that NOT all numbers have a pattern to derive a formula. To solve part (c), you can just list the numbers following the pattern to find the answer OR by observing OTHER numbers and use logical reasoning to derive your answer faster! How do we do it? Watch the video to find out! :) Do Q3. 

Q7 (Triangular numbers)
Learn how to work backward to find the Pattern number (letter n) with the formula for triangular numbers! :) Do Q6. 

Q8 (Square numbers & Triangular numbers)
Repeat numbers in rows! How do we solve this type of question? ;p Watch the video to find out! :) 

Q9 (Square numbers and Triangular Numbers)
How is this question different from the rest? ;p Do you think you can solve it WITHOUT watching the video? ;p Accept the challenge and attempt the question first! :) After watching the video, work on Q10 and Q11. 

Q13 (Common Difference and Numbers involving 2, 6, 12, ..)
Tired of watching the video? ;p Well ... then my tips to you will be ... observe the layout of the squares to find the formulas for the Number of white tiles and Total number of tiles! :) 

Q14 (Group Common Difference)
Finally, let's us see how we solve question involving group common difference! FYI, this type of pattern appeared in past PSLE papers! Do Q15 & Q16 for more practices! :) 