Until it is measured, not known. Yet how you miss it when it has gone. What is it?

Count the number of lines in the image below ?

There were two grandmothers and their two granddaughters.
There were two husbands and their two wives.
There were two fathers and their two daughters.
There were two mothers and their two sons.
There were two maidens and their two mothers.
There were two sisters and their two brothers.
Yet there are only six, who are buried here,
All are born legitimate and relationships clear.
How can this happen?

Solve the equation by replacing the alphabet with numbers.

MOM + MOM + NO = BOOK=

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?

Can you find the company name in the pictogram below?

You bought me for dinner but never eat me. What am I?

What does below science rebus mean?

Ag Ag Ag
Ag SPOON Ag
Ag Ag Ag

I have no life, but I can die. What am I?

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