Sherlock Holmes was challenged to make a pre-drawn line smaller without erasing it. He did it in fractions of seconds. How?

What's the next in the series?

H, Be, F, S, Mn, Kr, In, Gd, Tl, ?

Find the hidden panda in the image below.

Open a Laptop which is password protected. Hint for the password is given as below:

1 mobile 3 books 2 Boards 1 night 4 balls 2 lighters 1 ghost 1 hat 3 watches

How can you drop a raw egg from a height onto a concrete floor without cracking it?

I came first on earth but second on the heaven.
I also came twice in a week but found just once in a year.
I stay away from months but you can find me in February.

What am I?

Can you circle exactly four of these numbers such that the total is twelve?

1 6 1
6 1 6
1 6 1
6 1 6

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

What's the only room from which no one can enter or leave

In four steps you need to move the word 'cold' From 'warm' by replacing one alphabet at a time such that every word formed at each step is acceptable in English Dictionary.