On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

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?

If 1+9+8=1, what is 2+8+9?

What does this below rebus puzzle mean?

Take one out and scratch my head, I am now black but once was red. What am I?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?

A network of 20 x 10 squares is given to you.

Can you calculate how many unique squares and rectangles can be formed combining two or more individual squares ?

Can you find the missing piece of the Porsche?

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?