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

The centre of the third figure is empty. What digit should fit inside?

Find The Next Number In The Sequence

30 10 15 13 0 16 -15 ?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

Spelt forwards I’m what you do every day, spelled backwards I’m something you hate. What am I?

John was going on a jungle trip. He asked his wife to pack something to eat, something to drink and something to burn if he feels cold in the jungle. When John opens the backpack he found just one thing in the bag. What was it?

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?

I went to the bookshop and spent one-half of the money that was in my purse.

When I came out, I found that I had as many cents as I had dollars and half as many dollars as I had cents when I went in. Find the money in my purse when I entered the store.

I have a clock(12-hour format) and both the needles of the clock overlap at 12:00.
After how much time, they will overlap again?

What is the longest word in the dictionary?