## Oct 11, 2009

### PSLE 2009: PSLE Maths - some of the questions

http://psle2009.blogspot.com/2009/10/psle-maths-some-of-questions.html

### PSLE Maths - some of the questions

The above figure is a square. The angle question answer above is 150 degrees. Because the bottom triangle is equilateral triangle. (draw a circular curve through all 3 lines and they become the radii of the incomplete circle otherwise known as the arc)
360 - 60 = 300 degree
300 degree / 4 = 75 degree
75 degree x 2 = 150 degree

6 friends decided to rent computers from 2pm to 4.30pm. While 4 of them were playing, the other two would watch. If the cycle continues, and each of them played for equal number of minutes, how many minutes will each person get to play? Ans: 100 minutes

Mei and Lin were in a bicycle race. Mei was travelling at a constant speed of 20km/hr and they both did not change their speed. When Lin completed half the race, Mei was 3.5km ahead. Mei completed the race at 10.45am. What time did Lin complete the race? Ans: 11.06am

Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim's sweets to chocolates became 1 : 7 and the ratio of Ken's sweets to chocolates became 1:4. How many sweets did Ken buy?. Ans: 68 sweets

Curry puff shop sells puffs at \$0.80 each. Offer:Buy 3 get 4th half price. If customer has \$50, how many puffs can he buy if he buys as many as he can. Ans: 71 puff

String of 2 big balloons is 90cm
String of 5 small balloons is is 1.2m
If both strings are of the same length, there would be 105 more small balloons than the big balloons. How many balloons are there altogether? Ans: 345

### PSLE 2009 most difficult question

http://psle2009.blogspot.com/

### PSLE 2009 most difficult question

Jim bought some chocolates and gave half of it to Ken. Ken bought some sweets and gave half of it to Jim. Jim ate 12 sweets and Ken ate 18 chocolates. The ratio of Jim's sweets to chocolates became 1 : 7 and the ratio of Ken's sweets to chocolates became 1:4. How many sweets did Ken buy?. Ans: 68 sweets

Let me show you how to solve the most difficult question using the easiest to understand way.

Jim
Sweets - 12: Chocolate
1 : 7
Ken
Sweets : Chocolate - 18
1 : 4

Jim
Chocolate = 7u x (Sweets -12)

Ken
4u Sweets = Chocolate - 18

combine two, (substitute chocolate into Ken's equation)
4u Sweets = 7u x (Sweets -12) -18
4u Sweets = 7u Sweets - 84-18
3u Sweets = 102
1u Sweets = 34

34 x 2 = 68 sweets bought

This is the simultaneous substitution concept which makes the problem sum so simple and easy to solve, this my easiest way to explain to my current P5 students how to solve this "national level" Maths problem sum that baffled this year's P6 students.

## Oct 7, 2009

Amazingly myriads of ways of creating Magic Squares by hand!!!!

1. ### YouTube - Vedic Mathematics -MAGIC SQUARES - Creating Magic Square ...

11 Aug 2009 ... Enter the fascinating world of Magic Squares. VSR explains how to create magic squares in few seconds using Vedic Mathematics.
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3. ### YouTube - Magic Square 4x4 multiple part 4

4x4 Magic Squares method 2, making more with one magic square, post rating and a comment, THANKS.
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9. ### YouTube - Magic Square - Sixty Symbols

7 Aug 2009 ... Bit of Da Vinci Code moment here as Professor Eaves fuses his love of mathematical games and a famous piece of art.
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Making more Magic Squares from one diferent types "all from one and one from all"
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13 Jun 2009 ... If you like this app, here's an extra tip for you: When the magic square that totals their age first﻿ comes up, hold down the home button ...
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6 May 2008 ... Just one example of how an effect can be customized to demonstrate a concept. This same effect can be used to illustrate connectivity, ...

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6 Jul 2009 ... http://www.mentalist-videos.com/ Watch the mentalist Lior Manor performing the Magic Square.
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How to construct Magic Squares - by chandru arni · Added. 2:24. How to construct Magic Squares - by chandru arni. 4752 views ...
27. ### YouTube - Howl's Moving Castle OST Sullimans's Magic Square

Yet another OST from the Amazing Film Howl's Moving Castle! Enjoy! i will also be uploading the Spirited Away OST, so stick around!

The complexity of Magic Squares goes far beyond the Sudoku puzzles we see in our d. ... Latin squares are not Magic Squares or Sudoku problems, ...
29. ### YouTube - LUNIA MYTH2 SOLO Krieg vs Foriel (magic square)

9 Aug 2009 ... Just a video capture with my solo myth2 with magic square.
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29 Mar 2009 ... SoMF - Secrets of Magic ForumThe Secrets of Magic Forums is a community based website focused on the ... Magic Squares. 5475 views ...
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Professor Layton and the Curious Village Puzzle #095: A Magic Square. Hello, you either have JavaScript turned off or an old version of Adobe's Flash Player ...
32. ### YouTube - Circle to Square Magic - KelvinChun.com

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Magic square (Hard) : You have to answer 15 everywhere. I suggest you solve them on a paper first. Category: Gaming. Tags: ...

The complexity of Magic Squares goes far beyond the Sudoku puzzles we see in our d. ... Latin squares are not Magic Squares or Sudoku problems, ...
36. ### YouTube - explosion619's Channel

I didn't invent the magic square, but besides that, the rest of the effect is ... BTW, I might post a tutorial on drawing magic squares these days, ...
37. ### YouTube - Vedic Maths - Find the square of a number in few seconds

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44. ### YouTube - Shaw Brothers Brave Archer and His Mate

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this video explains what square numbers and cube numbers are and then shows you how to find the square ... CALDWELL'S CUBE magic square pattern. 493 views ...
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Magic trick secret, card magic secret, coin magic secret, mind reading, shuffle technique, ... Soda Can Magic Trick. 404 views. licciar · Magic Squares ...
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48. ### YouTube - The Brave Archer English Dubbed

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49. ### YouTube - edgemiky's Channel

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50. ### YouTube - Mayan Calendar Magic Part 1

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51. ### YouTube - Puzzlaholic's Channel

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52. ### YouTube - Rubik's Magic Puzzle

You've heard of the Rubik's Cube, but do you remember the Rubik's Magic Puzzle? You were supposed to move the squares to form a picture that showed ...
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54. ### YouTube - T-SQUARE WITH Marlene- It's Magic

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55. ### YouTube - Fruit and Nut Chocolate Squares - Part 2

Host Lekshmi Nair shows how to prepare 'Fruit and Nut Chocolate Squares' in this episode of 'Magic Oven' on Kairali TV. Category: Howto & Style ...
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