An artist while painting a scenic beauty, decides to paint three layers of blue colour on the sky.

Which layer will go on the first?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

13 decks of cards have been mixed. What is the minimum number of cards that must be taken out from the above-mixed cards to guarantee at least one 'four of a kind?

An express train takes 3 seconds to enter the tunnel which is 1 km long.
If it is travelling at 120 km an hour, how long will it take to pass completely through the tunnel?

How many triangles are there in the picture below?

Take away the whole and some still remain. What is it?

You order chicken wings at KFC in the boxes of 6, 9 and 20. What is the largest number of wings that you cannot obtain by buying in any combination of the boxes?

John enters a small room. The Door Closes.
When the door opens, John is in a larger room.

Explain?

Why do we preferably have round manhole covers and not square ones?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?