A challenging brainteaser tests critical thinking with a math problem of finding the missing value: 3 - 3 x 6 + 2 = ?. Solvers have seven seconds to use the BODMAS rule. Frequent practice of such ...
The students huddled around their tables, scribbling and erasing their notes, nodding and shaking their heads and rearranging the blocks in front of them. “There has to be a hole in the middle.” “We ...
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