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Simple looking equation stumps people - can you remember the 'special rule' to get right answer?

In grade school, you were probably constantly drilled on mathematics. Whether it be multiplication tables, simple addition, or complicated division, it was taught over and over again that quick math ...
Daily Mail on MSN

Simple-looking math test question leaves people baffled - can you solve it in 30 seconds?

Get out your timer and number two pencil to see if your arithmetic skills from grade school are still intact.