৮০৩১
Among 100 students, the average marks in English is 78. If the 60 girls scored an average of 84, determine the average score of the remaining boys.
উত্তর
69
৮০৩৩
In a two-digit number, the difference of its digits is 2. If the digits are interchanged, the new number is 6 less than twice the original. What is the number?
উত্তর
24
৮০৩৬
A garrison has food for 40 days for 200 soldiers. After 10 days, 50 soldiers leave. How many more days will the remaining food last?
উত্তর
40 days
৮০৩৮
Four bells ring at intervals of 6, 8, 12 and 18 minutes respectively. If they all ring together at 2 : 00 noon, when will they ring together again?
উত্তর
3 : 12 PM
৮০৩৯
In a partnership, three friends invested Tk. 2700, Tk. 8100, and Tk. 7200 respectively. After one year, the third partner received Tk. 3600 as his share of the profit. How much total profit did the business make?
উত্তর
Tk. 9000
৮০৪০
A 125-meter-long train overtakes a person moving at 5 km/h in 10 seconds, while both are moving in the same direction. What is the speed of the train?
উত্তর
50 km/h