How many times do a clock's hands overlap in a day ?

What four weights can be used to balance from 1 to 30 pounds?

They came out at night, without being called.
They lost at day, without being stolen.
Who are they?

John was running from 40 thieves. John has got 3 gold boxes which weigh as 4kg, 2kg, and 1kg respectively. A witty man asked John to stay with him for seven days in exchange for 1kg gold per day. John needs to stay there for seven days and also do not want to give the witty man any advance. How can John pay for his seven days stay?

Can you arrange four 9's and use at most 2 math symbols, to make the total 100?

A seven-year-old kid challenged his classmates that he can make the number one disappear by adding something to it.

How can he do that?

What has many teeth, but cannot bite?

I know there are two methods by using three time the same number with a plus(+) operator , you can make sum as 60.

One of them is 20+20+20.

whats the other way ?

Count the number of triangles in the below picture?

Find the hidden tiger in the given optical illusion ?