Calculate the number 5566
NUMBERMANIA: Calculate the number 5566 using numbers [6, 4, 2, 6, 68, 629] and basic arithmetic operations (+, -, *, /). Each of the numbers can be used only once.Correct answers: 13 
						The first user who solved this task is Nílton Corrêa de Sousa. 
				#brainteasers #math #numbermania
		
	
Double negative
A linguistics professor was lecturing to his class one day. "In English," he said, "a double negative forms a positive. In some languages though, such as Russian, a double negative is still a negative."
"However," he pointed out, "there is no language wherein a double positive can form a negative."
A voice from the back of the room piped up, "Yeah. Right."
 
		