A word I know,
Six letters contain,
Subtract just one,
And twelve is what remains.

We have four gears with below features=> Both Gear A and D has 60 teeth=> Gear B has 40 teeth=> Gear C has 20 teeth=> Every two minutes, Gear B makes 25 full turns.What is the relative speed of Gear A and Gear B?

I sleep during the day and fly at night, but I have no feathers to aid my flight. What am I?

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

A man wants to cross the pit of fire which is 25 feet in length and he has 2 planks(fire resistant) 19 feet in length. How can he cross the pit of fire alive?

Can you spot the man between the coffee bean in the picture below ?

A man is found hanging dead from the ceiling of a room. The room’s dimensions are 15 x 15 x 15. The man is only 6ft tall and the rope was only 2ft long. There are no windows and only one door to the room. The door is bolted shut from the inside, and a puddle of water is under the man. How did he kill himself?

Make a sentence consisting of three words that have the whole alphabet.

In the given figure, move three matchsticks so that the resulting figure contains two rectangles.

If we tell you that there is a relation between the numbers and letters in the given figure, can you analyze it and find the missing letter in the last box?