A * * * It took 1 12/ 14=8 days.

Assuming that it will be sunny for 8 days, we should take 20×8= 160.

More than the actual160-112 = 48, actually less, because it rains less. On rainy days, it is 20- 10= 10 less than on sunny days.

So it was rainy for 48/ 10=4.8 days.

Finally:

Rainy day =? ( 1 12/ 14×20- 1 12)/(20- 10)=4.8

Topic 2:

All correct answers get 100 points.

More than the actual 100-82= 18 points.

The actual score is low because there are wrong questions, and each wrong question is 5-(- 1)=6 points less than the question.

So there are 18/6=3 wrong questions.

The correct one is 17.

Finally:

Wrong question =(20×5-82)/[5-(- 1)]=3