When I get multiplied by any number, the sum of the figures in the product is always me. What am I?

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?

What Time Should the last watch show in the below figure?

It belongs to you, but other people use it more than you do. What is it?

Christina is older than Kareena and Karishma. Katrina is older than Karishma and younger than Kareena. If Kareena has a brother named John, who is older than Christina, who's the youngest?

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

What am I?

Which digit occurred maximum times between the number 1 and 1000?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Can you guess the name of the month by looking the below rebus ?

Take one out and scratch my head, I am now black but once was red. What am I?