It is always ahead of me yet I can never see it. What is it?

Complete the following series. It.s very logical:

1, 4, 5, 6, 7, 9, 11, __?

In a science lab, a petri dish hosts a healthy colony of yeast for an experiment. Now every minute, all the yeast cells divide into two. At noon, there was just a single cell of yeast and at 1:22, the Petri dish was half full. Can you calculate when the dish will be full of yeast?

Be active and find the killer in the picture Riddle below.

John and his wife were living in a rural place. On a particular day, John's wife fell ill and he called the local doctor. When the doctor picked up, he said, "Doctor, my wife is ill. She might have appendicitis."

"This can't be possible! I took out her appendix two years ago myself," the doctor explained.

When diagnosed, John's wife was found to have appendicitis. How can this be possible?

Can you decipher the following common phrase?

T M C
A U O
H S M
W T E

John killed hundreds of people mercilessly and yet the police were not able to put her behind the bars. Why?

Can you complete the sequence?

192, 021, 222, 324, 252, 627, 2__, 9__?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

As easy as you can get into me, it is as hard to get out of me.

Do you know what I am?