How many people must be gathered together in a room, before you can be certain that there is a greater than 50/50 chance that at least two of them have the same birthday?

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

O_er_t_o_

Complete the missing letters of the given word.

A woman named Maria was at the funeral of her mother. She met a nice young man that she had never seen before and after the service, they spent a bit of time together. Then she got busy and didn’t get his name or phone number before he left. She tried to find him, but no one knew who he was or how to contact him. A few weeks later, Maria’s older sister dies and the police suspect murder. Who killed the sister?

What is the next number in this matchsticks series riddle?

You need to pick one entry from pot A and one from pot B to have a perfect match. Can you do it?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

I’m light as a feather, yet the strongest person can’t hold me for five minutes. What am I?

Nine marbles are arranged in the image below. Can you slide two marbles to form a square?

I am the beginning of the end, and the end of time and space. I am essential to creation, and I surround every place. What am I?