একটি আয়তক্ষেত্রের দৈর্ঘ্য ১৮ সেমি. এবং প্রস্থ ১০ সেমি. আয়তক্ষেত্রের দৈর্ঘ্য বৃদ্ধি করে ২৫ সেমি. করা হলো। আয়তক্ষেত্রটির প্রস্থ কত হলে ক্ষেত্রফল অপরিবর্তিত থাকবে?
What is the probability that the product of two integers ( not necessarily different integers ) randomly selected from the numbers 1 through 20, inclusive , is odd ?
12,1,2 .... ধারাটির কোন পদ 82 হবে?
একটি দ্রব্য ১৮০ টাকায় বিক্রয় করায় ১০% ক্ষতি হলো । দ্রব্যটির ক্রয়মূল্য _
Pick the odd one out - 331, 482, 551, 263, 383, 242, 111
The product of two numbers x and y is twice the sum of the numbers. What is the sum of the reciprocals of x and y ?
How many different six-digit numbers can be formed using all of the following digits : 3, 3, 4, 4, 4, 5 ........
In 2007, the arithmetic mean of the annual incomes of Rahim and Karim was Taka 3800 . The arithmetic mean of the annual incomes of Karim and Ripon was Ripon and Rahim was TaKa5800. What is the arithmetic mean of the incomes of the three ?
In a set of three numbers, the average of first two numbers is 2. The average of the last two numbers is 3, and the average of the first and the last numbers is 4. What is the average of three numbers ?
A total of TaKa 1200 is deposited in two savings accounts for one year, part at 5% and the remainder at 7% . If TaKa 72 was earned in interest , how much was deposited at 5% ?
The different between a two-digit number and the number obtained by interchanging the positions of its digits is 36. What is the difference between the two digits of its of that number ?
The total income of Mr. Sakib in the years 2003 , 2004, and 2005 was TaKa 36,400 . His income increased by 20% each year. What was his income in 2005 ?
A rectangular swimming pool is 15 meter long and 30 meter wide. A deck, with uniform width, surrounds the pool. If the total area of the pool and deck is 1050 square meter what is the width of the deck in meter?
A certain suit's price was reduced by 25% in the first week and 20% in next week. In the third week, the shop owner decided to offer additional 10% discount on the suit. What percent of the regular price was the final price of the suit after the two reductions?
How much will you earn as interest if you deposit taka 1000 in a bank account for 2 years at 10% considering compound interest rate?
The price of each mango is 65 taka and the price of each guava is 45 taka. Aslam buys total to mangoes and guavas at an average price of 56 taka. How many mangoes must Aslam put back and replace with guavas so that the average price of the pieces of fruit that he keeps is 52 taka?
Of the total no. of oranges that arrive at a juice company, 20% by weight is rejected before processing. Of the oranges that are processed, 15% by weight is rejected before being juiced. Of the oranges that are juiced, 25% are wasted as a result of juice making . Of the oranges, those arrive at the company, what percent by weight is juiced?
In a batch of 500 students, forty percent are girl. Twenty-five percent of the boys and half of the girls agreed to go for a study tour. What percentage of the entire batch did not sign up for the tour?
If the product of two numbers is 102 and their sum is 23 then what is the highest number?
Arman can complete a job in 12 hours and Rehan can complete the same job in 8 hours. Arman started the job at 10:30 a.m., and stopped working at 2:30 p.m. To complete the job, if Rehan starts working at 3 p.m., at what time can he finish the job?