Quickly Solve this riddle

7 - 4 + 3 * 0 + 1 = ?

Why is it very easy to weigh a fish?

I make a loud sound when I’m changing. When I do change, I get bigger but weigh less. What am I?

Can you find a pattern and the missing number in the series given below?

100, 155, 258,? , 584, 819.

Eight of us go fourth, not back, to protect our king from an attack. What are we?

There were five men at church, and it started raining while they were outside. The four that ran still got wet, but the one that was still stayed completely dry. Why did he stay dry?

Replace the question mark with the number below given a simple math problem.

On a certain day, John celebrated his birthday. Two days later, his older twin brother Jacob celebrated his birthday.

Is this even possible? How can it be?

Why is the Hole below a Lock?

There was once a troop of 5 elves. The 5 elves were very dedicated on finding the magical treasure of 1000 coins. However, being elves, they were super geniuses, very greedy and they did not hesitate in taking lives of other elves. The 5 elves were named Aye, Bee, Cee, Dee and Ee, ranked from high to low respectively, from Aye to Ee. One fine day, their efforts brought results and they found 1000 coins. Now they had to split it in between them as per their ranks. The lowest ranked elf has to make the proposal. If the proposal is accepted by majority, it is agreed, or the suggesting elf is killed.

What proposal should elf Ee make ?