When can we add 2 to 11 and get 1 as the correct answer?

1 rabbit saw 9 elephants while going to the river. Every elephant saw 3 monkeys going toward the river. Each monkey had 1 parrot in each hand. How many animals are going towards the river?

Two trains start at the same time, one from Bangalore to Mysore and the other from Mysore to Bangalore. if they arrive at their destinations one hour and four hours respectively after passing one another, how much faster is one train running than the other?

That attorney is my brother, testified the accountant.

But the attorney testified he didn't have a brother.

Who is lying?

Take away my first letter, then take away my second letter. Then take away the rest of my letters, yet I remain the same. What am I?

Spot what is wrong here in below Picture?

You are in a room that has three switches and a closed door. The switches control three light bulbs on the other side of the door. Once you open the door, you may never touch the switches again. How can you definitively tell which switch is connected to each of the light bulbs?

A 52% bias toss for head using the 51% tail bias coin was done to obtain a fair result.

Can you find how bias is the floor in this case?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

Can you Find and name the hidden bird in the picture below ?