Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

It's pretty hard to give up.
If you remove a part of it, you will be left with a bit.
Even if you remove another part, the bit still remains.
Remove one more and it still remains.

What is it?

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

You and your two friends are working in a multinational company. How can you three find out the average salary of you all without disclosing your own salary to the other two?

My thunder comes before the lightning; my lightning comes before clouds; my rain dries all the land it touches. What am I?

If your uncle’s sister is not your aunt, what relation is she to you?

In the image below, you can see two glasses and two matchsticks.You need to move four matchsticks in such a manner that the crosses come inside the glasses. Note: you cannot move the crossed.

I noticed one of the words in the oxford dictionary is spelled incorrectly. What about you?

I have a hole in my back and legs I lack.
I live where I can’t breathe and I eat without teeth.
What am I?

Next Number in the Series,

5, 16, 49, 104, ?