What's the next in the series?

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

Take number 1000 and then add 20 to it.
Now add 1000 one more time.
Now add 30.
Now add 1000 one more time.
Now add 40.
Now add 1000 one more time.
Now add 10.

What is the total?

What month of the year has 28 days?

What Adam and Eve do not have but the rest of the people have?

Imagine a box with two cogwheels, one big with 24 teeth and one small with 8 teeth. The big one is firmly attached to the center of the box which means it does not turn or move while the small one rotates around the big one.

How many times do you think that the smaller wheel will turn compared to the box when it turns once around the big one?

Solve the below puzzle by replacing the question mark with the correct number.

3 6 12

4 8 16

5 10 ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

O_er_t_o_

Complete the missing letters of the given word.

I am looking for a word that change both gender and number when i add the letter 'S'.

What Word am I Looking For ?

P is the father of Q and S is the son of R. T is the brother of P and has a daughter U. If R is the sister of P, then what is the relation between U, Q and S?