Can you fill the blank with the correct number?

6 30 870 756030 _____

Which Travels Faster? Solve below famous picture riddle:

I know a ten-letter word in the English language which can be typed using only the top rows of the computer keyboard.

What has a ring but no finger?

Find the Next Number in the Sequence

2 9 3 1 8 4 3 6 5 7 ?

If you paint a brown house white it will become a white house. If the stoplight changes from red to green, then the light is green. So, if you throw a white shirt into the Red Sea, what will it become?

What number does the below three word/phrase identify and why?
1. Deck
2. Year
3. Singing in the Rain

You are provided with a grid (as shown in the picture). Can you fill the squares with numbers 1-8 in a manner that none of the two consecutive numbers are placed next to each other in any direction (vertically, horizontally or diagonally?)

A man lives on the fifteenth floor of an apartment building. Every morning he takes the elevator down to the lobby and leaves the building. In the evening, he gets into the elevator, and, if there is someone else in the elevator, or if it was raining that day, he goes back to his floor directly. Otherwise, he goes to the tenth floor and walks up five flights of stairs to his apartment. Can you explain why he does this?

You have a roll of cloth 1km long. You have a machine which cuts this roll into pieces of 10-meter-long cloth.

How long would it take for the machine to cut the roll if each cut took 4 secs?