The more it dries, the wetter it becomes. Can you tell what it is?

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?

There is a brick of gold and a brick of iron in a boat (both 10-inch blocks), if they are both dropped into the water which will make the water level higher?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Why is a river so rich ?

With the help clues provided in the image, can you find the 5 digit key?

What has no start, end, or centre?

I live in a bowl. I can swim. I have a tail. I also have fins and big eyes. What am I?

You know three triplets: Frank John and Wayne (need to return your money). Frank always tells the truth while John and Wayne always lie. You meet one of them on the road and can ask him a three-word question.
Which question, will you ask?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?