Friday, November 8, 2013

Circle



Circle C has the equation (x-4)2 + (y-8)2 =289
The point P (x,y) lies on C.
a) Find, in terms of x and y, the gradient of the tangent of C at P.
b) Hence, or otherwise, find an equation of the tangent to C at the point (21,8).

mensuration

A circular pipe has outer diameter 4 cm and thickness t cm.
a) Show that the area of the cross section, A cm2, is given by A=pi(4t-t2)
b) Find the rate of increase of A with respect to t when t=1/4 and when t=1/2



maths activities



http://www.bbc.co.uk/schools/gcsebitesize/maths/activities.shtml

maths activities



http://www.bbc.co.uk/schools/gcsebitesize/maths/activities.shtml

Mock test IPM std 4 / std 5


http://downloads.bbc.co.uk/schools/gcsebitesize/maths/mocks/mathsmockf2_calc.pdf

reference

topics on Geometry, numbers, ratio, surds etc.

http://www.bbc.co.uk/schools/gcsebit...2hirev10.shtml

Monday, October 21, 2013

Ratio and Proportion



 

STD 5 - clock

What is the angle between the hour arm and the minute arm of a clock at 3:15.

Time and Money



       A man invested Rs. 3300 in a bank on simple interest for 2 years at 5% p.a. Had the man invested the same principal at the same rate of interest for the same period compounded annually, what would be the percentage increase in the interest earned?

profit and loss




     I purchase some eggs for $100. 20% of the eggs break in transit, out of the remaining 25%was rotten. What profit percentage should I make on the remaining to get an overall 20% profit?