Complete the following series. It.s very logical:

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

I have 50 feet long of cloth, I need to create 50 handkerchiefs each size of 1 foot. I take one minute to cut a 1-foot handkerchief. So how long will it take to cut 50 handkerchiefs?

You are on a Boat in the mid of a river. You have two cigarettes with you. One of these two you have to light, how will you light the cigarette?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

There is a box full of marbles,
all but two are blue,
all but two are green,
and all but two are red.

How many marbles are in the box?

Which three-digit number, made of consecutive digits, like 567, is 2 less than a cube and 2 more than a square?

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Here is a conversation between a couple who both are software professionals.

Husband: Hey! What is your date of birth?
Wife Replied Angrily: It is 591062400
Husband after doing some calculations replied, "Got It".

What is the DOB of the wife?

What can go through glass without breaking it?