What's the next in the series?

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

Can you find out which triangle will have a bigger area among the following?
1. A triangle with sides 300, 400 and 500
2. A triangle with sides 300, 400 and 700

I guess 76.8% of readers will like this riddle.

What's the least number of people should read this post?

Can you find the odd number in the following five choices?

1) 482636
2) 259807
3) 865195
4) 104739
5) 391744

Krish is 45 years old and his mother Crishtina is 73 years old.

Can you find out how many years ago, his mother was three times his age?

Why do you find that most of the buildings are deprived of the 13th floor?

What number should come in place of the question mark below?

It is raining today at 11:59 am. What is the probability of sunny weather after 72 hours?

Thirty friends were on a hiking trip when they decided to enjoy the bonfire. They assembled for it and agreed to play a game. For that, they divided themselves into five teams with seven members each, forming five rows.

How did they manage to achieve this formation?

A new Engineering building containing 100 offices had just been completed. John was hired to paint the numbers 1 to 100 on the doors. How many times will John have to paint the number nine (9)?