What's the next in the series?

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

You see a boat filled with people, yet there isn’t a single person on board. How is that possible?

Given that

(78)^9 = 6
And (69)^4 = 11

Can you find out

(99)^2 =?

(Note: This is Logical, not Mathematical)

John had a bag containing colourful marbles. The colours are red, green and blue. The total number of marbles he had in his bag was 60. There are 4 times as many red marbles as green marbles. 6 more blue marbles than green marbles. How many marbles of each colour did John have?

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

What Word am I Looking For ?

John decided to give his bike 3 coats of paint. Which coat would go on the first?

Here is a mathematical expression that also secretly tells a movie name. What movie is that?

There is a basket full of hats. Three are white and two are black. Three men, Tom, Tim, and Jim, each take a hat out of the basket and put it on their heads without seeing the hat they selected or the hats the other men selected. The men arrange themselves so Tom can see Tim and Jim’s hats, Tim can see Jim’s hat, and Jim can’t see anyone’s hat. Tom is asked what color his hat is and he says he doesn’t know. Tim is asked the same question, and he also doesn’t know. Finally, Jim is asked the question, and he does know. What colour is his hat?

You have two strings whose only known property is that when you light one end of either string it takes exactly one hour to burn. The rate at which the strings will burn is completely random and each string is different.

How do you measure 45 minutes?

Why did Navjot Singh Sidhu put the new January calendar in the freezer