## Monday, September 28, 2015

### P5/P6 geometry (fr NMOS)

(Hint: construct an equilateral triangle using one of the lines )

## Monday, September 7, 2015

### P5 Percentage ( fr Richie )

> A fruit seller had 10% more oranges than apples. After selling 20 apples and 48 oranges, he had 90% as many oranges as apples. Find the number of oranges he had in the end.

## Wednesday, September 2, 2015

### P5 Average (an extension question by CCL)

James wrote a few numbers on a piece of paper and calculated the average of the value of these numbers.
If James wrote another, 10, on the paper, the average would be reduced by 1.
If he wrote the number 106 instead, the average would be increased by 3.

(a) How many numbers did he write on the piece of paper originally?
(b) What was the original average value?

Modified from

## Tuesday, September 1, 2015

### P5 numbers (fr koobits, NMOS via Sylvia c)

1/9/15 5:23:18 pm: Sylvia Chang (5c15):

300 people stand in a row.
Starting from the first person on the LEFT, each person calls out a number in this pattern: 1,2,3,1,2,3,1,2,3...
Starting from the first person on the RIGHT, each person calls out a number in this pattern:1,2,3,4,1,2,3,4,1,2,3,4...
How many people call out the number 2 twice?

Sent from my iPhone