Can you calculate the probability of getting a sum of six when a dice is thrown twice?

Take away the whole and some still remain. What is it?

Four men were in a boat on the lake. The boat turns over, and all four men sink to the bottom of the lake, yet not a single man got wet! Why?

In the four images below, can you find the odd one out?

Find the next number in the sequence

1, 2, 6, 21, 88, __?

If nine thousand, nine hundred nine dollars is written as $9,909,
how should twelve thousand, twelve hundred twelve dollars be written?

Can you count the number of squares in the figure below?

Double it and multiply it by 4. Then divide it by 8 and you’ll have it once more. What number is it?

Queen Elizabeth organised a royal party.

To Avoid uninvited guest royal family set a password.
Jack (an uninvited person) plan to enter the party. He stand nearby the door.

First guest comes, the security person said 'twelve' and guest replied with six.
Second guest comes , the security person said 'six' and guest replied with 'three'.

Jack thought is enough and he walked to the entry point. The security person said 'eight' , Jack replied smilingly 'four'.
He was immediately thrown out of the party. why ?

What does below chemistry rebus means?