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

I had an infinite supply of water and 5 litres and 3 litres jars.

How would you measure exactly 4 litres in the least number of steps?

Jessica is telling her friends this story and asks them to guess if it’s the truth or a lie: “There was a man sitting in a house at night that had no lights on at all. There was no lamp, no candle, and no other source of light. Yet, he sat in the house and read his book happily.” Her friends say she’s lying, but Jessica corrects them and says she’s telling the truth. Jessica’s story is true—but how?

You need to complete the maze by entering from the entrance marked below in the figure near the yellow circle, bottom left and leaving from the exit point near the green circle, bottom middle.

Rule of Game: You can move only by exchanging green and yellow circles.

Can you find the next number in the below sequence
3 , 7 , 10 , 11 , 12 , 17 ?

Can you solve the maths in the below-given picture equation?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

A man says, "Brothers and sisters, have I none, but that man's father is my father's son." Who is that man?

Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3