What word does this rebus represent?

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I never stop running even when I standstill. If I am formed by joining two identical bodies together, can you guess who I am?

A finger goes in me. You fiddle with me when you're bored. The best man always has me first. What am I?

What is the next number?

77, 49, 36, 18 ?

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 make numbers like 24, using numbers 3,3,7 & 7 with any arithmetic operator?

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

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?

They are three errirs in this question. Can you find them?

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