২২৮৫১
If 4 is subtracted from one - fourth of a number , the result is 20. The number is
উত্তর
96
সমাধান
Let, the number x
x/4 - 4 = 20
বা, x/4 = 24
so, x = 96
২২৮৫২
A carpet that measures 6 ft by 8 ft covers 60% of a floor. What is the area of the floor?
উত্তর
80
সমাধান
6ft * 8 ft = 48 ft260% area = 48 1% area = 4860 100% area = 48×10060 = 80 ft2 (Ans.)
২২৮৫৩
per day wage rate of workers is reduced 50% due to economic slow down. After one year ,the wage rate is increased by 60%. If the per day wage rate before the decrease was Tk.. 100, then what is the per da y wage rate Now?
উত্তর
80
সমাধান
Per day wage rate before the decrease was Tk. 100 per day wage rate of workers is reduced 59%. So, wage rate is ( 100 - 50) = 50
After one year rate increased 60% = 50 + 50 of 60% = 50 + 50×.6 = 80
২২৮৫৪
one third the sum of 13 and a certain number is the same as one more than twice the number.Find out the number.
উত্তর
2
সমাধান
Let, the number x
1/3 (13 + x) = 2x + 1
বা, 13 + x = 6x + 3
বা, 6x - x = 13 - 3
বা, 5x = 10
so, x = 2
২২৮৫৬
dMr.Salam deposited Tk. 800 in a Bank at 15% annual compound interest rate. At the end of the second year, the total amount including the interest will be.
উত্তর
1058
সমাধান
Total amount including the interest . =
800 ( 1 + 15/100)2 = 1058
২২৮৫৭
The average of 6 numbers is 25. If 3 more numbers, with an average of 22 are added to these numbers, what will be the average of the combined 9 numbers?
উত্তর
24
সমাধান
Sum of 6 numbers are = 25*6 = 150Sum of 3 numbers are = 3*22 = 66Sum of 9 numbers are = 150+66 = 216Average of 9 numbers are = 216/9 = 24 (Ans.)
২২৮৫৮
An empty pool is being filled with water at a constant rate. It takes 6 hours to fill 2/3rd of the pool. How much time will it take to completely fill the pool?
উত্তর
9
সমাধান
For filling 2/3 rd of the pool, it takes = 6 hoursfor filling complete portion, it takes = 6*32 = 9 hours (Ans.)
২২৮৫৯
you can now buy 5 more Oranges with Tk. 75 due to reduction in rice by 20 percent Calculate the current price of one dozen of Oranges.
উত্তর
36
সমাধান
Shortcut method
cost/price = given % /100 × total tk /no of more less × no of products for the cost
Cost = 20/100×75/5 ×12 = 36
২২৮৬০
What is the minimum number of sweets that must be added to an existing batch of 240 sweets, so that the total batch can equally be divided among 2,5 and 7 persons?
উত্তর
40
সমাধান
LCM of 2, 5 and 7 are = 70ভাজ্য = ভাজক*ভাগফল + ভাগশেষ240 = 70*3 + 30So, minimum number is required = 70 - 30 = 40 (Ans.)