Thursday, February 13, 2014
A courier company charged $18 for every large parcel and
$10 for every small parcel safely delivered.
However, it paid paid a penalty of $20 for every lost or damaged parcel regardless of size.
If the company delivered 145 parcels (inclusive of safely-delivered or damaged ones)
and collected an amount of $1030, how many of each type of parcels did it deliver safely?
(ie. how many Large, Small and Damaged parcels were delivered)
WARNING: There are many, but finite number of, solutions to this problem. Can you find them all? :)
Here's my solution together with some insights into the problem. Check this out:https://docs.google.com/document/d/1HI3C1ASeJgXVLSLkOWpO4R6zczlQdLuet2fIEB04Rec/pub
Posted by ChangCL's Site at 6:12 PM
Wednesday, February 12, 2014
In the beginning, there was a square.
Its length was decreased by 25% and its breadth was increased by 100 cm.
As a result the square had been transformed into a rectangle with the same area.
(a)What was the length of the initial square?
(b)What was its area?
Posted by ChangCL's Site at 4:07 PM
Click here for my solution:
Posted by ChangCL's Site at 1:50 PM