Wednesday 7 September 2011

Oral Health & Hygiene - Maths Problem #3

Hi everyone,
A huge congratulations to Rooms, 10, 3, 4, 11, and 8 who worked out yesterdays problem. I hope I haven't missed anyone out...
Of course the answer was 7. I really like the way Room 11 showed their working.

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Here's today's problem: (You could try these strategies - make a table, or subtraction)

To fight plaque attacks, you should limit the number of times you eat sncks each day. For the first week, Fetoa ate 6 snacks per day. But realizing he needed to limit the number of snacks he ate, the second week he ate 3 snacks per day. The third week he ate 2 snacks per day. What is the difference between the number of snacks he ate the 1st and 2nd week? The 2nd and 3rd week? The 1st and 3rd week?

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