Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?

Why is Saturday stronger than Monday?

What number comes next in this sequence:
7 8 5 5 3 4 4 _

Count the number of triangles in the picture below:

Below toothpicks/matchsticks indicate the group of fishes moving from west to east direction. Can you make them move from east to west by just moving three toothpicks/matchsticks?

John is found dead in his office at his desk. The police have narrowed the suspects down to three people: Mrs. Jacob, John’s wife Hena and his business partner Jason . All three visited John on the day of his murder, but all three provide the police with stories of explanation as to the reason for their visit.
Police found John with his wrist watch still on his right arm, a torn up picture of his wife laying on the floor beside the trash can, and an ink pen in his right hand. On the desk, the police found a name plate, a telephone that was off the hook, and a personal calendar turned to the July 5th page with 7B91011 written on it. After examining this evidence, the police knew their suspect. Who was it ?

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

This is a classy optical illusion puzzle. What more you can find except bricks in the image below?

By using all numbers, i.e. 123456789 and subtraction/addition, operators number 100 can be formed in many ways.
Example: 98 + 7 + 6 - 5 - 4 - 3 + 2 - 1 = 100

But if we add a condition use of the number 32 is a must. Then there are limited solutions.
One of such solution is: 9 - 8 + 76 + 54 - 32 + 1 = 100

Can you tell me any other solution?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?