Question: Bob is tilling a plot of his garden. The plot is 110 feet wide by 120 feet long. His tiller digs a swath two feet wide, and he can till 1 foot of ground in about 2 seconds. How long will it take him to till this plot of land, in minutes?
Answer: If Bob goes along the side that's 120 feet long, he will till 110 / 2 = 55 rows. Each of these rows are 120 feet long, so he will push the tiller a total of 120 * 55 = 6,600 feet. He tills 1 linear foot of ground every 2 seconds, so it will take him 2 * 6,600 = 13,200 seconds to till this plot. 13,200 seconds is 13,2000 / 60 = 220 minutes. The answer is 220.

Question: Mark can jump 6 inches off the ground. Lisa can jump double the height as Mark, and Jacob can jump double the height of Lisa. If James jumps 2/3 as high Jacob, how high can James jump?
Answer: Lisa can jump 6 * 2 = 12 inches. Jacob can jump 12 * 2 = 24 inches. James can jump 24 * (2 / 3) = 16 inches high. The answer is 16.

Question: In four years, Peter will be twice as old as Harriet. If Peter's age is currently half of his mother's age, who is 60, how old is Harriet now?
Answer: If Peter's age is currently half of his mother's age, who is 60, Peter is 1 / 2 * 60 = 30 years old. In four years, Peter will be 30 + 4 = 34 years old. Since Peter's age in four years will be twice Harriet's age, Harriet will be 34 / 2 = 17 years old in four years. Currently, Harriet is 17 - 4 = 13 years old. The answer is 13.

Question: Mr. Ha owns 5 more silver dollars than Mr. Phung. Mr. Phung has 16 more silver dollars than Mr. Chiu has. If Mr. Chiu has 56 silver dollars, how many silver dollars the three have in total?
Answer:
Mr. Chiu has 56 silver dollars. If Mr. Phung has 16 more silver dollars than Mr. Chiu, then his total silver dollars is 56 + 16 = 72. The total number of silver dollars that Mr. Ha owns is 72 + 5 = 77. Combined, together they have 77 + 72 + 56 = 205 silver dollars. The answer is 205.