In the addition below, all digits have been replaced by letters. Equal letters represent equal digits and different letters represent different digits.
ABCABA
BBDCAA
ABEABB
ABDBAA
------- +
AAFGBDH
What does the complete addition look like in digits?

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

The first box has two white balls. The second box has two black balls. The third box has a white and a black ball.

Boxes are labeled but all labels are wrong!

You are allowed to open one box, pick one ball at random, see its colour and put it back into the box, without seeing the colour of the other ball.

How many such operations are necessary to correctly label the boxes?

Three ants are sitting at the three corners of an equilateral triangle. Each ant starts randomly picks a direction and starts to move along the edge of the triangle. What is the probability that none of the ants collide?

Which is Odd One Out and why?

4377

3954

9862

8454

9831

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

If you read clockwise, you can form a word by inserting three missing letters in the picture given below. Can you do it?

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

What always comes into a house through the keyhole?

Find The Next Number in the series:

12 13 15 17 111 113 117 119 123 ?