Which five letter word can be added at the end of below word to form a
valid word?

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A man has eighty-one cows ( numbered 1,2,3...81 as such). The beauty is that cow no. 1 gives 1ltr of milk, cow no. 2 gives 2ltrs of milk and so on. The man wants to equally distribute the cows among his nine sons so that each one of them gets the same quantity of milk.

It comprises roots which nobody sees,
Much taller than those trees,
Up and up it goes,
Still it never grows?

What's the next in the series?

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

There is a unique number which when multiplied by any number from 1 to 6, we will get the new number that contains the same digits only.

Can you find that number?

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

A word I know has six letters it contains, remove one letter and 12 remain. What is it?

After teaching his class all about Roman numerals (X = 10, IX=9 and so on) the teacher asked his class to draw a single continuous line and turn IX into 6. The teacher's only stipulation was that the pen could not be lifted from the paper until the line was complete.

You have a square. What you have to do is cut and reassemble the square such that you create a Red Cross sign that has the same volume as that of the square.

An office is divided into 8 cubicles. How many of the cubicles are painted if only 1/8 of the cubicles are painted?