A mile-long train is moving at sixty miles an hour when it reaches a mile-long tunnel. How long does it take the entire train to pass through the tunnel?

Do You See It?

Using mathematical symbols like +, -, and x in order to make the equations correct. Replace # with the above-given symbols.

9 # 8 # 7 # 6 # 5 # 4 = 91

Can you find the missing letter in the sequence?
S - T - I - L - ? - T - F - Y - C

Its something that each of us devours,
Not just us but birds, beats, trees, and flowers,
Frets iron and nibbles steel,
Toil hard stones to meal,
Exterminates king, collapse town,
And blows the mountains down.

I look at you, you look at me I raise my right, you raise your left. What am I?

What has no start, end, or centre?

What is the largest amount of money that you can possess in change and still if someone asks you for a dollar, you won't be able to give?

Look at the picture and find out which square is not linked with any of the other squares.

Can you find the thief by just looking at the picture below?