You are given with the following sum. Each of the letters can be decoded as a digit. If we tell you that D = 5, then can you solve it entirely?

DONALD
+GERALD
=ROBERT

There are 2 cops parked along a one-way street looking for traffic violations. They spot a taxi driver going in the wrong direction, yet they do nothing.

Why?

Why is 6 afraid of 7?

I have no doors but I have keys, I have no rooms but I have space, you can enter but you can’t leave! What am I?

Replace the question mark with the correct number below.

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

During an experiment, a guy throws a bouncy ball from a 100 feet tall building. The ball has a specific characteristic. Every time it hits the ground, it bounces up halfway.

How many bounces do you think the ball will make before it comes to a stop ?

How can you take 2 from 5 and leave 4?

Can you convert the number zero(0) into a positive number using just one mathematical operator ?

What do you get if you add 2 to 100 four times?