If you remove one from eleven, it becomes ten. If you remove one from nine, it becomes ten.

How is this possible?

How will you measure 15 minutes using two hourglasses of 7 minutes and 11 minutes respectively?

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

Can you name three consecutive days without using the words Monday, Tuesday, Wednesday, Thursday, Friday, Saturday, or Sunday?

There is a basket full of hats. Three are white and two are black. Three men, Tom, Tim, and Jim, each take a hat out of the basket and put it on their heads without seeing the hat they selected or the hats the other men selected. The men arrange themselves so Tom can see Tim and Jim’s hats, Tim can see Jim’s hat, and Jim can’t see anyone’s hat. Tom is asked what color his hat is and he says he doesn’t know. Tim is asked the same question, and he also doesn’t know. Finally, Jim is asked the question, and he does know. What colour is his hat?

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

What does the below image rebus riddle means ?

Using eight eights and addition only, can you make 1000?

You can hear me, but you can't touch or see me.

What am I?

What do you get if you add 2 to 100 four times?