Monthly Archives: February 2017

The answer to the first-grader problem

The unknown numbers are, of course, 6, 5 and 3. What’s the difference between them? Well, you can’t find the difference between three numbers. You can find the difference between the unknown numbers on the right side, though. So you do just that and get 2. That’s another unknown number we found out. Now just find the difference between 6 and 2. The final answer is 4. Makes sense? What, it doesn’t? I agree. Figures.

Find the difference between the unknown numbers

This is a really stupid problem for Russian first-graders (7 years old or so). Given the picture below, find the difference between the unknown numbers. That’s it, really. I’m not joking.

Find the difference between the unknown numbers

Hints:

  1. The difference means...

    “The difference” means you have to subtract something from something. Answers like “the difference is that there is one unknown number to the left and two to the right” sound OK, but unfortunately are wrong.

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  2. The unknown numbers are...

    If you think that the unknown numbers are 6, 5 and 3, you’re correct. But how on earth do you find the difference between three numbers?

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  3. Almost the answer

    Don’t forget that this problem is for 7 year olds and it’s all about subtraction.

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