By: jenizaro
Is there a mistake in Superman’s calculation? Shouldn’t it be 3,200? You’re right! I sort of made a sly comment about it in the second bullet in the list to the left of the picture, about usually...
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By: Mental Arithmetic Exercises
there is some serious good stuff here … one of my favourite stories is of gauss (?) who at primary school added all the numbers from 1 to 100 in a few seconds … a task the teacher gave the class to...
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