If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

What is the next number in this series?

4,12,84,3612....

Find the missing number in the sequence below:

I am thinking of a five-digit number such that:
The first and last digits are the same, their submission is an even number and multiplication is an odd number and is equal to the fourth number. Subtract five from it and we obtain the second number. Then divide into exact halves and we get the 3rd number.

What number I am thinking of?

If you're 8 feet away from a door and with each move you advance half the distance to the door. How many moves will it take to reach the door?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

I have a five and a three-gallon jar. Assuming there is an infinite supply of water, how can I measure one-gallon water?

Can you name any English verb that becomes its past tense by simply rearranging the alphabets ?

Can you place six matchsticks in a manner that each of the matchsticks is in touch with the other five matchsticks?

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?