What goes up but never comes down?

Most people think of me as money. But when they find me in the water, they won’t get any money out of me. What am I?

Look at the below sequence of letters and tell us what the next letter should be:

O T T F F S S ?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

Can you find out the smallest number that can be conveyed as the sum of three squares in three unique ways?

Can you solve below mathematical equation?

2^1234 - 2^1233

In the following series, a set of numbers is progressing with a particular pattern. Can you deduce that pattern and find the missing set?

(2 + 6), (21 + 6), (58 + 6), (119 + 6), ___

What word is pronounced the same if you take away four of its five letters?

I am the black child of a white father, a wingless bird, flying even to the clouds of heaven. I give birth to tears of mourning in pupils that meet me, even though there is no cause for grief, and at once on my birth, I am dissolved into air. What am I?

What can you deduce from the following BrainBat?

CRY
LMKI