Queen Elizabeth organised a royal party.
To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.
First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.
Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?
In a school, there are four subjects. Seventy percent of students study English, seventy five percent of students study Science, eighty five percent of students study Mathematics and eighty percent of students study Spanish.
Can you calculate the percentage of students that study all four subjects?
What is always in front of you but canâ€™t be seen?
Can you calculate the probability of getting a sum of six when a dice is thrown twice?
You have a basket containing ten apples. You have ten friends, who each desire an apple. You give each of your friends one apple.
Now all your friends have one apple each, yet there is an apple remaining in the basket.
How?
The following alphametic has only one solution. Can you find it?
ENLIST + SILENT + LISTEN = ANAGRAM
PS: You may start the number from 0.
On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.
Is this even possible? How can it be?
Can you convert the number zero(0) into a positive number using just one mathematical operator ?
You have 1023 apples and 10 bags. You have to distribute these apples in these 10 bags in any way you choose. But when I ask for a certain number of apples you have to give them in terms of bags without transferring the apples from other bags. How do you distribute the apples?
John left on a horse on Thursday , was gone for two days, and came back on Thursday after completing his work. How did that happen?
Jenifer and Jesica are having a conversation.
Jenifer: I am definitely not over 30.
Jesica: I am 28 and you are surely 5 years older to me at least.
Jenifer: No, you are at least 29.
You are told that both of them are lying throughout in the conversation. Can you find their respective ages?
In 2007, a puzzle was released and $2 million prizes were offered for the first complete solution. The competition ended at noon on 31 December 2010, with no solution being found. Wiki