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If a man dug a hole and a half in an hour and a half how many holes and a half will he dig in ten and a half hours?
he will dig 7 1 and 1/2 holes
If it takes six men one hour to dig si x holes how long does it take one man to dig half a hole?
You cannot dig half a hole. It may be only half as big, but it is still a hole. So the answer is a moment. This is an old, old riddle/joke.
If it takes 3 men 6 hours to dig 12 holes how long does it take 2 men to dig 9 holes?
It takes 3 x 6 = 18 man hours to dig 12 holes. Therefore it takes 18/12 = 1.5 man hours to dig 1 hole. To dig 9 holes takes 9 x 1.5 man hours = 13.5 man hours If 2 men are working then they take 13.5/2 = 6.75 hours or 6 hours 45 minutes.
If 5 men did five holes 5 feet deep in five hours how long will it take one man to dig half a hole?
You can't dig half a hole. If you dig there is a hole.
If it takes 5 men to dig 5 holes in 5 hours how many men does it take to dig 100 holes in 100 hours?
Assuming they can work in parallel, the answer should be 5. 5 men produce 1 hole per hour in the first example. At that rate, they produce 5 holes in 5 hours. The same 5 men, working at one hole per hour, should be able to produce 100 holes in 100 hours (assuming they don't need sleep, etc.)
