If six children and two dogs were under an umbrella, how come none of them got wet?

Can you count the number of lines in the below picture?

There are three boxes which are labeled as Rs100, Rs150, and Rs200. One box contains two notes of Rs. 50. The second box contains one note of Rs50 and one note of Rs100 The third box contains two Rs. 100 notes. All boxes are labeled incorrectly.

What is the minimum number of boxes you must check in order to label all boxes correctly?

You can see three almost identical images below. Can you spot the odd one out from them?

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?

A Scientist was fifty years old in the year 2000 but he was forty years old in the year 2010. How can this be possible?

PS: It has a logical answer.

Can you decipher the following common phrase?

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

When you say goodbye, I am what you need to tie.
I come as a couple and go wherever you run.
Who am I?

Many have heard it, but nobody has ever seen it, and it will not speak back until spoken to. What is it?

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