Can you find out the missing number?

? 4 5 3 5

9 5 7 10 3

If we change the South-East direction into North and North-East into West and all others similarly.
Can you find out which direction will be in the place of South-West direction?

What comes
Once in a Year
Twice in a Month
4 times in a Week
6 times in a Day

A man was telling some of his war stories to his grandchildren.
"When the World War I was on the verge of end, I was awarded for my bravery for I had saved a group of my men." He coughed and then added, "When we were fighting in northern France, an enemy soldier threw a grenade at us. Before it could explode, I picked it up and threw it away. For my act of bravery, right before the war ended, A General gave me a sword engraved with the words "Awarded for Display of Bravery and Heroism in World War 1"."

Hearing this, one of the grandson spoke up. "Grandpa, this is not a true story. It can"t be true!"

The truth is that it was not. How did the grand children know it?

What does below chemistry rebus means?

Replace the question mark with the correct number, given the pair of numbers exhibits a similar relationship?

? : 3839 :: 11 : 1209

I am weightless, but you can see me. Put me in a bucket, and I'll make it lighter. What am I?

Next Number in the Series,

5, 16, 49, 104, ?

Place the numbers from 1 to 9 in the circles in a manner that each side of the triangle sums up to 17.

Use only one mathematical symbol and all numbers (0-9) to get a sum of 99