Ratio and proportion: lesson A
1:12:42
Expnential equations
12:10
Ratio and proportion: lesson B
17:40
Numerical on time require the water tea pot to be heated by heater
41:56
Parallel and Perpendicular Lines, Transversals, Alternate Interior Angles, Alternate Exterior Angles
24:45
Classification OF NUMBER SYSTEM
1:01:10
using logarithms to do evaluation
14:59
Circle theorem lesson B
19:12