A high school has a strange principal. On the first day, he has his students perform an odd opening day ceremony:

There are one thousand lockers and one thousand students in the school. The principal asks the first student to go to every locker and open it. Then he has the second student go to every second locker and close it. The third goes to every third locker and, if it is closed, he opens it, and if it is open, he closes it. The fourth student does this to every fourth locker, and so on. After the process is completed with the thousandth student, how many lockers are open?

You need to remove two matchsticks to make the below equation true. Can you do it ?

Distances from you to certain cities are written below.

BERLIN 200 miles

PARIS 300 miles

ROME 400 milesAMSTERDAM 300 miles

CARDIFF ??? miles

How far should it be to Cardiff ?

While sitting in the Car, John suddenly finds that one of the wheels was missing. John noticed that a killer is approaching towards him. John cannot get out of the car.

How will John escape?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

I am a mother. However, I never give birth.

I am a father. However, I never nurse my children.

Wandering is not possible for me, but standing still happens occurs rarely.

Who am I?

What is the fewest number of coins that would be required in order to make sure each and every coin touches exactly three other coins?

I’m tall when I’m young, and I’m short when I’m old. What am I?

What is harder to catch the faster you run?

I throw two dice simultaneously.

What is the probability of getting a sum as 9 of the two numbers shown?