Question : 12 men can complete a work in 6 days working 4 hours per day. If 4 men work 8 hours per day, then in how many days the same work will be completed?

Option 1: 8 days

Option 2: 6 days

Option 3: 9 days

Option 4: 10 days

Question : M alone can complete a work in 50 days and N alone can complete the same work in 100 days. If both of them work together, then in 25 days what percentage work of the total work will be completed?

Option 1: 60%

Option 2: 55%

Option 3: 75%

Option 4: 80%

Question : 63 men can complete a work in 30 days. In how many days 21 men will do the same work?

Option 1: 70 days

Option 2: 85 days

Option 3: 90 days

Option 4: 88 days

Question : X and Y together can do a work in 10 days. Y and Z together can do the same work in 15 days. Z and X together can do the same work in 12 days. In how many days can Z alone do the same work?

Option 1: 80 days

Option 2: 60 days

Option 3: 40 days

Option 4: 50 days

Question : A work can be completed by 20 men in 50 days. 30 more men join them after 10 days of work. How many days will be saved in the completion of the work?

Option 1: 18 days

Option 2: 20 days

Option 3: 24 days

Option 4: 28 days