Complete the following series. It.s very logical:

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

A charming young lady was approached by a kind looking old woman in a restaurant. The old woman said to her, 'You look exactly like my younger daughter. Sadly she passed away a couple of months back. Could you do me a favor and say 'Goodbye, mother' with a kind smile on your face when I leave?

The young lady agreed for the same and said, 'Goodbye, mother' when the old woman left. Soon after, she got the most disengaging shock of her life.

Can you guess what the shock was?

The dirtier I get, the whiter I look. Who am I?

A thief enters a store and threatens the clerk, forcing her to open the safe. The clerk says, “The code for the safe is different every day, and if you hurt me you’ll never get the code.” But the thief manages to guess the code on his own. How did he do it?

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

If in a car race, the man who came two places in front of the last man finished one ahead of the man who came fifth, how many contestants were there?

As you can see that fifteen matches have been used to form an arrangement. What you have to do is remove any six of them to make them ten.

If I remove one from eleven it becomes Ten and if I remove one from nine also becomes Ten. How?

On her drawing table, Sayna lit 12 coloured candles. A few seconds later she blew two candles off.

How many candles Sayna have at the end?

A maths symbol is hidden in the below Bar Graph. Can you decipher it?