Answers to Puzzle Contest #6

I would like to congratulate Hive account@doughtaker for being the first person to provide all the correct answers to this contest. I would also like to congratulate the following people for also providing the correct answers.

Hive account@singhrajat
Hive account@believeme
Hive account@funatoz
Hive account@mydivathings
Hive account@zonguin
Hive account@benedicamillius
Hive account@ir3k
Hive account@xabi
Hive account@wilramos
Hive account@spydo
Hive account@wovlou
Hive account@thatindianlady
Hive account@sad-dad

Unfortunately, only the first person to provide all the correct answers wins the 20 SBD.

I would also like to thank the following people for participating in this contest.

Hive account@firemanvishal
Hive account@suheri
Hive account@kettleyer
Hive account@mr-aaron
Hive account@younggirl
Hive account@improv
Hive account@freedomno1
Hive account@shreyansh
Hive account@awaischuchi
Hive account@mikel2la1
Hive account@skpjr001
Hive account@freedompoint
Hive account@ankarlie
Hive account@josediccus
Hive account@gusvzla
Hive account@belovebelight
Hive account@lavanya
Hive account@rocking-dave

Here are the answers and explanations for all 4 questions.

Question 1

Question 2

Question 3

Question 4

I will be starting another contest in a few days.