এক কুইন্টাল সমান কত কেজি?

$০.০১ \times ০.০০১$= কত?

১ থেকে ২০ এর মধ্যে মৌলিক সংখ্যা কয়টি?

$if x+\frac{1}{x}=2; find the value of x^{17}+\frac{1}{x^{19}}=?$

In a flight of 600km, an aircraft was slowed down due to bad weather. Its average speed for the trip was reduced by 200km/hr and the time of flight increased by 30 minutes. The duration of the flight is:

P does a work in 12 days for 8 hours and Q does a work in 8 days for 10 hours. If both work for 8 hours then how many days it needed to complete the work?

Two men X and Y started working for a certain company at similar jobs on January 1, 1950. X asked for an initial salary of Rs. 300 with an annual increment of Rs. 30. Y asked for n initial salary of Rs. 200 with a rise of Rs. 15 every six months. Assume that the arrangements remained unaltered till December 31, 1959. Salary is paid on the last day of the month. What is the total amount paid to them as salary during the period?

A sum of taka 725 is lent in the beginning of a year at a certain rate of interest. After 8 months, a sum of Tk. 362.50 more is lent but at the rate twice the former. At the end of the year, Tk. 33.50 is earned as interest from both the loans. What was the original rate of interest?

A farmer wishes to start a 100 sq.m rectangular vegetable garden. Since he has only 30m barbed wire, he fences three sides of the garden letting his house compound wall act as the fourth side fencing. The dimension of the garden is

Three pipes A, B and C can fill a tank in 6 hours. After working at it together for 2 hours, C is closed and A and B can fill the remaining part in 7 hours. How many hours will take C alone to fill the tank ?

A scientist has 400 units of a 6% phosphoric acid solution, and an unlimited supply of 12% phosphoric acid solution. How many units of the latter must she add to the former to produce a 10% phosphoric acid solution?

A school store sells only one kind of pen and pencil at a uniform price per pen or per pencil. If the cost of 3 pens and 6 pencils is twice that of 12 pens and 4 pencils, then the total cost of 2 pens and 4 pencils is how many times that of one pen?

A basin can be filled by tap A in 5 hours and tap B in 8 hours, each tap working on its own When the basin in full and a drainage hole is open, the water is drained in 20 hours. If initially the basin was empty and someone started the two taps together but left the drainage hole open, how long does it take for the basin to be filled?

A circular garden is surrounded by a road. If the outer circumference of the road is greater than the inner circumference by 88 meters, what is the width of the road?

A micro-bus was hired at Tk. 5,500 to travel intercity. The fare is to be shared equally among the passenger on the day of travel, but due to the absence of 5 passengers, the average fare per person was doubled. How many people availed the service?

$if a+\frac{1}{a}=3, provr that a^4+\frac{1}{a^4}=119$

Sum of ages of mother and daughter is 60 years. 5 years ago, the ratio of their age were 4:1. What will be the ratio of their age after 10 years?

In a boys school, if 5 students sit in every bench, 4 benches are empty. But if 3 students sit in every bench. 20 students are left standing. What is the number of benches in the class?

The sum of three times the smaller and four times the larger is 71 and twice the larger of two numbers is three more than five times the smaller. What are the numbers?

`ক’ একটি কাজ ২০ দিনে এবং ‘খ’ ঐ কাজটি ৩০ দিনে করতে পারে। কাজটি ‘ক’ ও ‘খ’ একত্রে ৫ দিন করার পর যায়। এরপর ‘খ’ বাকী কাজটি কত দিনে করতে পারে?