১০৬৪১
A mixture of 20kg of spirit and water contains 10% water. How much water must be added to this mixture to raise the percentage of water to 25%?
উত্তর
8
১০৬৪২
From the figure, which of the following must be true? (I) x + y = 90 (II) x is 35 units greater than y (III) x is 35 units less than y
উত্তর
II only
১০৬৪৩
If Rafi and Suman together can complete a job in 12 days. If Rafi alone can finish the job in 20 days, in how many days can Suman alone complete the work?
উত্তর
30 days
১০৬৪৪
If 10 men or 18 women can do a work in 50 days then how many days would it take 25 men and 15 women to do twice the work?
উত্তর
30 days
১০৬৪৫
Musa can do 1/4 of a work in 6 days. In how many days will he complete the work?
উত্তর
24 days
১০৬৪৬
30 workers can build 60 machines working 4 hours per day. How many extra workers are required to produce 90 machines working 6 hours per day?
উত্তর
0 workers
১০৬৪৭
P can complete a piece of work in 18 days, while Q can complete the same work in 36 days. If both P and Q work together, in how many days will they be able to complete the entire work?
উত্তর
12 days
১০৬৪৮
A ferry can carry 25 trucks or 40 motorcycles at a time. If there are 15 trucks on the ferry, how many motorcycles can be loaded onto it?
উত্তর
16 motorcycles
১০৬৪৯
A man can do a work in 20 days and a woman in 15 days. If they work on it together for 5 days, then the fraction of the work that is left-
উত্তর
5/12
১০৬৫০
John can paint 60 walls in 20 minutes. Emma can paint 9 walls in 15 minutes. Working together, how many walls can they paint in 25 minutes?
উত্তর
90 walls