Primary 6 Question - ABCD is a square ....

Question

ABCD is a square. RS=PR=QR and SQ is perpendicular to PR. Find angle SPQ ?

Answer

Primary 6 Question

Question

There were 40 more raisin buns than strawberry buns. After 3/4 of the raisin buns and 4/5 of the strawberry buns were sold, there were 28 buns left.

(a) How many strawberry buns were there at first?

(b) What fraction of the buns sold were raisin buns?

Answer

Distance/Speed/Time Question

Question

This question came from my reader's comment

Distance between Town X and Y is 100km.
At 07:00, Sam left Town X and cycled towards Y.
Ann left Town X and cycled towards Y at 07:30.
Ann's cycling speed was 4 km/h faster than Sam. At 10:00, Ann caught up with Samuel. When Ann was 28 km from town Y, she stopped to wait for Samuel.

(a) How far was Samuel from Ann when she stopped to wait for him?

(b) How many minutes did Ann wait for Samuel?

Answer

First answer is kind of model-based, but a bit too long. I prefer the second method which uses a triangle to represent distance/speed/time relationship. Although there is little bit of algebra, I think the kid should be able to handle it.

Primary 6 Problem Sum

Question

A box contained 50¢ coins and 20¢ coins in the ratio 2:3. When I took out four 50¢, exchanged them for 20¢ coins, and put then put the money back into the box, the ratio became 2:7. Find the sum of money in the box.

Answer

Two different ways to solve this problem

Six Steps to Model Approach

I will be using this question to illustrate my six step approach in solving problem sum.

Questions

Aminah and Belinda each has some money. If Aminah spends $8, the ratio od the amount of money Aminah has to the amount of money Belinda has becomes 2:3. If Belinda spends $8, the ratio of the amount of money Aminah has to the amount of money Belinda has will be 11:14. How much money do they have altogether?

Answer