If you’ve got me, you want to share me; if you share me, you haven’t kept me. What am I?

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?

Buy me, smell me or deliver me, I do not change.

Who am I?

Can you replace the question mark with the correct number in the below table sequence?

Do you know of a place where the wind blows south and then suddenly shifts direction towards the north?

You are mixing a mixture of cement and Sand with five gallons of water. You have a garden hose giving you all the water you need. The problem is that you only have a four-gallon bucket and a seven-gallon bucket and neither has graduation marks. Find a method to measure five gallons.

I welcome the day with a show of light, I stealthily came here in the night. I bathe the earthy stuff at dawn, But by noon, alas! I'm gone.

What question can you never answer yes to?

What is black when you buy it, red when you use it, and gray when you throw it away?

In a rainy season, one day 3 huge ladies walked under a normal-sized umbrella.
The umbrella is not huge enough to accommodate all 3 ladies yet not a single lady got wet. Why?