Prolific puzzle inventor Henry Ernest Dudeney published the following problem in his 1917 book Amusements in Mathematics.The current version of the U.K.’s Union Jack flag was introduced in 1801. This ...
Get out your timer and number two pencil to see if your arithmetic skills from grade school are still intact.
Daily Mail on MSN
'Simple' math tests leaves people racking their brains - can you solve it in 30 seconds?
Get your timer out and see whether you can remember the golden rule from grade school math class.
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