Can you find four consecutive prime numbers that add up to 220?
47 + 53 + 59 + 61 = 220
See also best riddles or new riddles.logicshort
Peter celebrated his birthday on one day, and two days later his older twin brother, Paul, celebrated his birthday. How could this be?
When the mother of the twins went into labour, she was travelling by boat. The older twin, Paul, was born first, barely on March 1st. The boat then crossed a time zone, logicshort
How can one talk without saying a single word?
Sms/chat/using hand symbols.logicmathshort
Dean Sam and Castiel are three brothers.
Interestingly their current age is prime.
What's more interesting that difference between their ages is also prime.
How old are they?
Sam : 2
Dean : 5
Castiel : 7
7 - 2 = '5' is prime
7 - 5 = '2' is prime
5 - 2 = '3' is primelogicmathshort
Hockey Stick and ball cost $50. If the Stick cost $49 more than the ball. What is the cost of each ?
Hockey Stick $49.50 & ball $0.50.logicshort
A man hijacks an aeroplane transporting both passengers and valuable cargo. After taking the cargo, the man demands two parachutes, puts one of them on, and jumps, leaving the other behind. Why did he want two?
If the officials thought he was jumping with a hostage, they would never risk giving him a faulty parachute. logicshort
What does this rebus say? XLR8.
What happened when wheel was invented?
It caused a revolution.logicshort
Today is Admin's birthday. His five close friends Nell, Edna, Harish, Hsirah and Ellen surprised him with party.
What is special with this list of these five names ?
If you read the names from last to start, it reads the same.logicshort
John Heysham Gibbon was most renowned surgeon of 1940-1970. More than 90% of his surgeries he performed are highly successful and still almost all of his patients die.
The surgery was performed way back, by now approx 90% of them have died by old age.logicmathshort
The digits 0-9(0,1,2,3,4,5,6,7,8,9) can be rearranged into 3628800 distinct 10 digits numbers.
How many of these numbers are prime?
None. The sum of numbers from 0-9(0,1,2,3,4,5,6,7,8,9) is 45 and therefore can be divisible by 3 and 9.