Answer to Question 1
You can do this if you know your two times table.
1 x 2 = 2 In 1 day the snail climbs 2 feet.
2 x 2 = 4 In 2 days it climbs 4 feet.
3 x 2 = 6 In 3 days it climbs 6 feet and it has reached the top of the pole.
The Answer is 3 days.