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#8 Question of the Week


Anna bought some highlighters, pens and mechanical pencils. 1/4 of them were highlighters. The number of pens she bought was 6 more than 1/2 the total number of all the items and the remaining items were mechanical pencils. Each of the highlighters, pens and mechanical pencils cost $2.10, $4.05 and $1.60 respectively. She spent a total of $227.10 on all the itmes. How many pens did she buy all together?

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Similar to last week, this week's question of the week also consists of two concepts:

1. Branching

2. Quantity and Value

From last week's QOTW, we said that quantity value is when a question that involves items that has both elements of quantity and value (i.e coins have a quantity element (6 coins) and a value element (6 10¢ coins).

Branching on the other hand, is a method to replace complicated part and whole models. Most schools will introduce branching methods in Primary 5.

“Our greatest weakness lies in giving up. The most certain way to succeed is always to try just one more time.” – Thomas A. Edison

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