What numbers should go on the bottom line?
3 6 9 15
8 2 10 12
11 8 19 27
19 10 29 39
? ? ? ?

It is deaf, Dumb and Blind!!!

Still, always tells the truth. What is it?

What building has the most stories?

What can run but never walk, have a mouth that never speaks, have a head that never weeps, and have a bed but never sleeps?

What jumps when it walks and sits when it stands?

Can you find the least possible number such that

If the number is divided by 3, it gives the remainder of 1;
If the number is divided by 4, it gives the remainder of 2;
If the number is divided by 5, it gives the remainder of 3;
If the number is divided by 6, it gives the remainder of 4.

When it's bad luck to meet a black cat?

Why are all black people so quick ?

Find the smallest sentence with all the English alphabet.

Why Aeroplane windows are round?