[Toddsterpatriot]

The 21/7 bombers only failed to kill and maim dozens of Londoners because the bomb-making "mastermind" could not do basic mathematics it emerged today,

Math is hard.

[Enterprise]

"Math is hard."

[Christopher Lincoln]

There used to be a slogan: "Math is power".

It is.

[GadareneDemoniac]

Dummies! Everybody knows there are only 12 months in a year! “21/7” - the seventh day of the 21st month? Whoa, these guys are real “morans”!

[I realize that Euros write dates differently, so my post is tongue-in-cheek. It does look funny, though.]