Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

A man fell off a smuggling boat into deep water. He could not swim and he was not wearing anything to keep him afloat. It took 30 minutes for the people on the boat to realize someone was missing. The missing man was rescued two hours later on the return trip. Why didn't he drown? Note:- He didn't know swimming, the sea was deep, and He wasn't holding anything

There is a box. The area of its top is 240 square units, the area of the front is 300 square units and the area of the end is 180 square units.

Can you calculate the dimensions of this box with the given data?

Find out the missing number in the picture attached:

You have $100 with you and you have to buy 100 balls with it. 100 is the exact figure and you can't go below or above the numbers and you have to use the entire $100. If there is no kind of tax applied how many of each of the following balls will you be able to buy:

Green Balls costing $6
Yellow Balls costing $3
Black Balls costing $0.10

Now, how many of each must you buy to fulfil the condition given?

What does this mean?

CCCCCCC

What has six faces, but does not wear makeup, has twenty-one eyes, but cannot see?

Spot the cat in the picture below

By including only four matchsticks in below picture, you have to make "Four Triangles And Two Squares"

Before Mount Everest was discovered, what was the highest mountain in the world?