The sum of the digits of two -digit number is 10, while when the digits are reversed , the number decrease by 54. Find the changed number .
A shopkeeper earns a profit of 12% on selling a book at 10% discount on the printed price. The ratio of the cost price and the printed price of the book is -
The selling price of an article after giving two successive discounts of 10% and 5% on the marked price is TK. 171 . What is the marked price ?
If A and B together can complete a work in 18 days, A and C together in 12 day and B and C together in 9 days, then B alone can do the work in -
A tank can be filled with water by two pipes A and B together in 36 minutes, the tank is filled in 40 minutes. The pipe B can alone fill the tank in -
In a 729 liters mixture of milk and water , the ratio of milk to water is 7:2 To get a new mixture containing milk and water in the ratio 7:3 the amount of water to be added is -
In what ratio must a grocer mix two varieties of pulses costing Tk. 15 and TK. 20 per kg respectively so as to get a mixture worth Tk. 16.50 kg?
A and B invest in a business in the ratio 3:2 . If 5% of the total profit goes to charity and A's share is Tk. 855 the total profit is -
The sum of ages of 5 children born at the intervals of three years each is 50 years what is the age of the youngest child?
Six years ago, the ratio of ages of Kunal and Sagars was 6 : 5. Four years hence, the ratio of their ages will be 11 : 10. what is Sagar's age at present ?
The price of 10 chairs is equal to that of 4 tables . The price of 15 chairs and 2 tables together is Tk. 4000. The total price of 12 chairs and 3 tables is-
If m and n are whole numbers such that mn=121, the value of (m-1)n+1 is
A pump can fill a tank with water in 2 hours . Because of a leak , it took 213 hours to fill the tank.The leak can drain all the water of the tank in -
The difference between simple and compound interest on a sum of money at 20% per annum for 3 years is Tk. 48. What is the sum ?
If A and B are in the ratio 3 : 4 and B and C in the ratio 12 :13 then A and C will be in the dratio-
A bag contains an equal number of one rupee , 50 paisa and 25 paisa coins . If the total value is TK. 35 , how many coins of each type are there?
If 40% of a number is equal to two -third of another number, what is the ratio of first number to the second number ?
A man starts climbing a 11 m high wall at 5 pm. In each minute he climbs up 1m but slips down 50 cm. At what time will he climb the wall?
Two trains of equal length , running in opposite directions, pass a pole in 18 and 12 seconds. The trains will cross each other in -
A boat can travel with a speed of 13 km/hr in still water . If the speed of the stream is 4 km/hr, find the time taken by the boat to go 68 km downstream .
A bag contains 4 white , 5 red and 6 blue balls. Three balls are drawn at rand dom from the bag .The probability that all of them are red.is :
The ratio between the perimeter and the breadth of a rectangle is 5 :1 . If the area of the rectangle is 216 cm2. what is the lenth of the rectangle?
The average age of A,B,C,D and E is 40 years. The average age of A and B is 35 years and the average of C and D is 42 years. Age of E is -
Three partners shared the profit in a business in the ratio 5 : 7 : 8 . They had partnered for 14 months, 8 months and 7 moths respectively . What was the ratio of their investments ?