Puzzle Contest #1 - Winner Gets Half the Total Payout of this Post

Hi Everyone,

Spectrum Economics is holding its first solve the puzzles contest. This post contains 4 puzzles.

The first person to solve all the puzzles wins half the total payout of the post.

If we do not get a winner, the prize money of this contest will be added to the available winnings of next contest.

How to Enter

To enter requires 1 upvote. Each entrant into the contest is only allowed 2 attempts. The attempt needs to be done in the comments section of the post. Some questions have several parts to them, all parts of each question need to be answered correctly for a chance to win.

I expect the answers to be presented in following format:

1. Answer 1a , 1b, 1c
2. Answer 2a, 2b
3. Answer 3
4. Answer 4

The closing date and time for the contest is 6PM USA Eastern Time 07/10/2017. Responses after this time will not be accepted. The answers and explanations will be provided in the comments section after the contest closes. The winner of the contest will be announced in the comments section and half the post payout will be paid to the winner as soon as I receive the payout from the post. Good luck everybody.

Let the Contest Begin

Question 1: Replace the Question Marks with the Correct Answers

Question 2: Replace the Question Marks with the Correct Answers

Question 3: Select the Letter of the Correct Answer

Question 4: Replace the Question Mark with the Correct Number of Circles to Make the Scales Balance

I hope you enjoyed this contest. There will be several more to come in the coming weeks.