If a solver flips a coin 211 times and gets a head on 65 of the flips, how many more tails than heads did he get? Give the rationale and then the answer.
Let's think step by step. If the solver got a head in 65 of the 211 flips, he got 211 - 65 = 146 tails. The number of tails than he got more than head is 146 - 65 = 81.. The answer is: 81.

There were sweets on the table. Jack came and took half of all the candies and 4 more candies. Then Paul came and took the remaining 7 sweets. How many sweets were on the table at first? Give the rationale and then the answer.
Let's think step by step. Jack took 4 more candies than the half, and Paul took the rest, which means 7 + 4 = 11 candies were half of all candies. That means at first there were 11 * 2 = 22 candies.. The answer is: 22.

In a factory, there are 300 employees. 200 of them earn $12 per hour. Of the rest, 40 of them earn $14 per hour. All others earn $17 per hour. What is the cost to employ all these people for one 8-hour long shift? Give the rationale and then the answer.
Let's think step by step. The cost of the 200 employees is 200 employees * $12 / employee / hour = $2400 per hour. The cost of the 40 employees is 40 employees * $14 / employee / hour = $560 per hour. The rest means 300 employees - 200 employees - 40 employees = 60 employees. These 60 employees' employment costs are at 60 employees * $17 / employee / hour = $1020 per hour. So in total all employees earn $2400 / hour + $560 / hour + $1020 / hour = $3980 / hour. During an 8 - hour shift, this cost would be at 8 hours * $3980 / hour = $31840.. The answer is: 31840.