What is in seasons, seconds, centuries and minutes but not in decades, years or days?

Find out a multi-digit number that if multiplied by the number 9 or any of its multiplications products (i.e. 18, 27, 36, 45,..) will result in the multiplication factor repeated (n) number of times.

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 ?

Make the seating arrangement of 10 children in such a way that there are 5 rows with 4 children in each row.

Can you count the number of blocks in the picture below?

Things are just as they seem, right? Well, check again.
Can you count the number of tigers in this picture ?

What is greater than gold but cannot be bought. it can never be sold and can earn if its sought. though it can be broken, it can still be fixed. for by birth it can't start nor by death it is ended.what am i?

You walk into a room that contains a match, a kerosene lamp, a candle and a fireplace. What would you light first?

Is the statement valid that it does not matter how much older a sibling is, eventually the younger one will be half as old as the older one?

John is pretty weird. He likes toffees but hates chocolates. He loves books but never reads. He likes to build his troops in an online game but does not proceed with the war. He likes to go swimming but is afraid of water.

Seeking this behaviour, can you tell whether he likes balloons and parties?