Wednesday, 16 October 2013

Brain buster!


The witch used 20 biscuits to decorate the roof of her house.
She lined them up and put icing on every second biscuit.
Then, she put a cherry of every third biscuit.
Then, she put a chocolate button on every fourth biscuit.

How many biscuits had no decorations on top?
Did any biscuits have all three decorations on top?

12 comments:

  1. The fifth
    the one that in the middle where it has the circle around it

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  2. This is hard to figer out because I can't see the buiscut's.

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    Replies
    1. Try drawing 20 circles for the biscuits on a piece of paper. Then draw icing on every second one, cherry on every third one and chocolate chips on every fourth. Let me know what answers you come up with Keylin.

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  3. I worked it out by counting. This is how I worked it out. Every 2nd cookie has iceing on it. Every 3rd cookie had a cherry on the top. Every 4th cookie has choclate chips. There are 7 cookies what don't have nothing on them.

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  4. I worked it out by drawring in my book 20 biscut's and then i drawed lines on every second biscut to show
    the icing,then i put a chery on every third biscut finily i put some choclate chips and there were 7 biscuts with
    no toppings on them and there were also 1 biscut with all toppings on.

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    Replies
    1. Do we have the first correct answer? Is she right Year 3?

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  5. there were 5 biscuits that didn't have have icing and decoration.

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  6. I can show you that the cherry has to be on top of 3 bisuts

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