What is the next number in the series?

15 29 56 108 208 ?

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

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

You have three orange, two pink and five purple balls in the drawer beside your bed. There is no electricity and the room is entirely dark. How many balls must you take out to ensure at least one ball of each colour at least?

What has a bottom at the top?

Chef Andrea has to light the kitchen stoves to open her restaurant for the day. There are three stoves in the kitchen: A glass stove, a brick stove, and a wood stove. She only has one match. Which does she light up first?

Can you count the number of triangles in the given figure?

Decode this picture on T-Shirt and tell what it says ?

Find the next number in the sequence

5 12 24 36 ?

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