Which is the smallest number that you can write using all the vowels exactly once?

Complete the table series riddle by finding the number that can replace "??".

I have four wings but can't fly.
I express no emotions.
I am found on the exact spot every time you look.
I keep toiling away with a little sound.

Do you know what am I?

When you stop to look, you can always see me. But if you try to touch me, you can never feel me. Although you walk towards me, I remain the same distance from you. What am I?

A girl is twice as old as her brother and half as old as her father. In 50 years, her brother will be half as old as his father. How old is the daughter now?

If it took eight men ten hours to build a wall, how long would it take four men to build it?

If there are fifteen crows on a fence and the farmer shoots a third of them, how many crows are left?

The current time can be represented by below textual rebus.

0
=========
B.Sc
LLB

Can you tell us the current time?

What does this rebus puzzle means ?

Three doctors said that Bill was their brother. Bill says he has no brothers. How many brothers does Bill actually have?