P5/P6 Numbers (Systematic counting)

How many triangles are there?

P6 percentage (fr Lloyd)

P6 Fraction (fr Keith, MyPals)

P6 ratio (fr Keith, Pasir ris pri)

P6 Fraction (fr Keith, my pals)

P6 Whole Numbers (Heuristics: Guess and Check, Algebra)

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)

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WARNING: There are many, but finite number of, solutions to this problem.  Can you find them all? :)

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Here's my solution together with some insights into the problem. Check this out:

https://docs.google.com/document/d/1HI3C1ASeJgXVLSLkOWpO4R6zczlQdLuet2fIEB04Rec/pub

P6 Percentage (Fr CCL. Modified from Shaping Math worksheet)

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?

P6 Ratio, Percentage (Fr Max, Nanyang Pri Ppr) tags: circle, triangle, rectangle

Click here for my solution:

P6 Percentage (Fr Shaping Math)