The more of this there is, the less you see. What is it?

Manish has to secure 40% marks to pass his B.tech final exams.
He got just 40 marks and failed by 40-marks.

What is the maximum marks?

What is the Surname of Barbie Doll?

A wooden log balances equally on the scales when weighed with three-quarters of a pound and three-quarters of a wooden log.

Can you calculate the weight of the entire wooden log?

How can you write nineteen in a manner that if we take out one, it becomes twenty?

Too much grey makes things difficult. However, your task here is to find the elephant hidden in the picture.

There are five vowels (a, e, i, o, u) in the English language.
Can you tell us a word that contains all these vowels?

He digs out tiny caves and stores gold and silver in them. He also built bridges of silver and made crowns of gold. They are the smallest you could imagine. Sooner or later everybody needs his help, yet many people are afraid to let him help them. Who is he?

There is a five-letter word which has 3 consonants(all are same) and 2 different vowels.
Also, something wrong is associated with the word.

Can you name it?

What is more useful when it is broken?