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?

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

Who are the happiest people in IPL match?

Can you guess the name of the month by looking the below rebus ?

If 1+9+8=1, what is 2+8+9?

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Outside a tattoo artist's shop, there was a signboard which read 'I make tattoos on only them who do not tattoo themselves'.

Reading it what do you think, does the tattoo artist tattoo himself?

I am green and found in the forest and have needles instead of leaves. What am I?
Hint 1: It can be used for Christmas decorations.
Hint 2: I have a strong, scent that is used in air fresheners.

Find The Next Number in this series.
1, 2, 6, 42, 1806 ?