When I got four, I have it none.
When I got two, I have it some.
When I got none, I have it all.

What is it?

A mathematics teacher took exams for his students. Out of the total students, 25% passed both the tests included in the exam. However, only 42% were able to clear the first test.

Can you find out the percentage of those students who passed the first test and also passed the second test?

1. How can we put an elephant in the refrigerator?
2. How can we put a Giraffe in a refrigerator?
3. The king of the jungle invites all the animals to a party everyone comes except for one animal, which animal?
4. You come to a crocodile-infested lake, you can't go around it, you can't co under it and you can't go over it, how do you get across?

Can you make a six-letter word using the letters N, A and B ?

This puzzle is for Harry Potter fans. Do you know why Tom Riddle is called Lord Voldemort?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

A certain street contains 100 buildings. They are numbered from 1 to 100. How many 9's are used in these numbers?

What is common among 11, 69, and 88?

How many triangles are there on the puzzle below?

Can you think of a smallest +ve number such that if we shuffle the digits of the number, the new number becomes double the original number?