Sunday, September 30, 2012
Thursday, September 27, 2012
P6 fractions (fr PSME Fractions pg 22)
Question states that Susan should be (Peter plus Drinks)x2/5.
What is shown in solution provided is Susan's mass = 2/5 of everything.
Click here to compare with the wrong solution provided in the answer key.
Tuesday, September 25, 2012
P6 circles, "find radius/ diagonal of rect" (fr Ryan c)
AC = BO (Diagonals of a rectangle are equal in length)
BO is effectively a radius = 3cm
P6 numbers, "chairs" (fr Chong yang)
My solution:
* I shall call the visible "un-overlapped" part of a chair's leg a "leg stub" for ease of reference.
Note that when measured from floor to foot of 4th chair, we are measuring 3 leg stubs (1 fewer than the total no. of chairs stacked up)
3 leg stubs --> 37.2cm
1 leg stub --> 37.2cm / 3 = 12.4cm
With 10 chairs stacked in this manner, there are only 9 leg stubs (10-1=9)
9 leg stubs --> 12.4cm x 9 = 111.6cm
(or just 37.2 x 3 = 111.6)
Therefore, the height of each chair is:
206.9 - 111.6 = 95.3 (cm)
Option: (2)
Monday, September 24, 2012
Sunday, September 23, 2012
Saturday, September 22, 2012
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