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Week 2

The problem:

   Which of these numbers is the odd one out? Why?

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These children chose 8. Seth said, "It is the only one with 1 number."
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This group thought that 66 was the odd number. Jenson explained that it is the only number with 2 digits the same.
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These children thought that 25 was the odd one out. Carla and Zane both explained that 25 was the only number that can't be divided by 2.
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The final group thought that 120 was the odd one out. Leah explained that it was the only 3 digit number.
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The solution:

 

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