Subject
Bank Exam
Topic
২০২১ সাল ভিত্তিক সমন্বিত ০৭ ব্যাংক (অফিসার ক্যাশ/টেলর) - ২৪.০৫.২০২৪
The difference between two numbers is 5 and the difference between their square is 65. What is the smaller number?
The difference between two numbers is 5 and the difference between their square is 65. What is the smaller number?
ক)
4খ)
5গ)
11ঘ)
13Explanation
Let the numbers be x and y Then, x - y = 5.........(i) x 2 - y 2 = 65 Or (x + y)(x - y) = 105 5(x + y) = 65 x + y = 13 ....... (ii) by adding (i) and (ii) we get, 2x = 5 + 13 2x = 18 x = 9 From (ii) we get x + y = 13 9 + y = 13 y = 13 - 9 y = 4 Hence, the smaller number is 4Related questions
সরল বাক্যের প্রধান অংশ কয়টি?A school has only three classes having 20, 30 and 40 students respectively. The percentages of students passed are 30%, 50% and 60% respectively. The percentage of passed students in the entire school is -'বাড়ি থেকে নদী দেখা যায়' কোন কারকে কোন বিভক্তি?A plane traveling at 600 miles per hour is heading for Chittagong airport. At 3.58 pm it was 30 miles from the airport. At what time it will arrive at the airport?'আভরণ' শব্দের অর্থ কি?If a 240-metre-long metro rail passes a pole in 24 seconds, how long will it take to pass a 650-metre-long platform?বাংলা ব্যাকরণে 'পদ' বলতে কি বোঝায়?The daily rate for a hotel room that sleeps 4 people is Tk. 390 for one person and X taka for each additional person. If 3 people take the room for one day and each pays Tk 210 for the room, then what is the value of X?