Explanation:

The number of flights leaving a certain airport doubles during every one-hour period between its 9 am opening and noon; afternoon, the number of flights leaving from the airport doubles during every two-hour period. If 4 flights left from the airport between 9 am and 10 am, how many flights left the airport between 2 pm and 4 pm? Correct Answer 64 9 টা থেকে noon অর্থাৎ 12টা পর্যন্ত flight সংখ্যা double হয় প্রতি 1 ঘণ্টায় । 9 টা থেকে 10 টায় ছুটি flight হলে 10 - 11 টায় 2x, 11 - 12 টায় 4x / Noori - এর পর প্রতি দুই ঘণ্টায় হয় দ্বিগুণ। 12 - 2 টায় ৪r 2টা থেকে 4টায় হয় 16x, তাহলে x = 4 দেওয়া আছে। সুতরাং ফ্লাইট সংখ্যা = 16x = 16 × 4 = 64

Explanation:

The distance between two stations, Dhaka and Chittagong is 450 km. A train starts at 5 pm from Dhaka and moves towards chittagong at an average speed of 60 km/hr. Another train starts from Chittagong at 4:20 pm and moves towards Dhaka at an average speed of 80 km/hr. At what time will the two trains meet? Correct Answer 6:10 pm ধরি, 5 টার t hour পরে তারা meet করে। তখন 4.20 থেকে 5 টার পার্থক্য = 4060 = 23 hour তারা meet করার সময় মোট 450 km অতিক্রম করবে। তখন, বেগ = দঃূরত্ত্বসময় তাহলে, 60t + 80(t + 23) = 450 140t + 160/3 = 450 140t = 11906 t = 17/6 বা 2 hr 50 min পর তারা meet করবে। 5 + 2 hr. 50 min = 7.50 pm

Explanation:

Two equal glasses are respectively one-third and one-fourth full of milk. they are then filled up with water and the contents are mixed in a tumbler. Ratio of milk and water in tumbler is : Correct Answer 7:17 সহজে হিসাব = 13 + 14÷23 + 34 = 717

Explanation:

Rahim's convertible gets gas mileage that is 40% higher than that of Karim's SUV. If Jalil's hatchback gets gas mileage that is 15% higher than of Rahim's convertible, then that of Rahim's convertible, then Jalil's hatchback gets gas mileage that is what percent greater that of Karim's SUV? Correct Answer 61% ধরি, করিমের convertible - এর mileage = 100 রহিমের convertible এর mileage = করিমের 40% বেশি = (100 + 40) = 140 এবং জলিলের concertible এর mileage = রহিমের 15% বেশি। = 140 + 140 এর 15% = 140 + 21 = 161 জলিলের hatchback - এর gas mileage করিমের চেয়ে (161 - 10O) = 61% বেশি।

Explanation:

At a college football game, 4/5 of the seats in the lower deck of the stadium were sold. If one-fourth of all the seating in the stadium is located in the lower deck, and if 2/3 of all the seats in the stadium were sold, what fraction of the unsold seats in the stadium were in the lower deck? Correct Answer 3/20 ধরি, total number of seats = x তাহলে lower deck এ seat = x×14 = x4 so unsold seat in lower deck = 15×x4 = x20 এখন, x×23 seats in whole stadium বিক্রি হয়েছিল, তাহলে unsold = (x - 23x)  =  x3 তাহলে ভগ্নাংশটি হবে = x20÷x3 = x20×3x = 320

Explanation:

To fill a number of vacancies, a company must hire 3 officers from 6 applicants, and 2 managers from 4 applicants. What is the total number of ways in which the company can make its selection? Correct Answer 120 এটি permutation এর অঙ্ক। 3 জন officer 6 জন  থেকে  =  6P3 এবং 2 জন manager 4 জন থেকে  =  4P2; total  =  6P3  +  4P2  =  132update: (11-02-23) it is combination problem. Since the order of vacancies doesn't matter.  6C3 = 20 and 4C2= 6,         20 × 6 = 120 is the right answer. Given ans is wrong

Explanation:

A discount electronics store normally sells all merchandise at a discount of 10 percent to 30 percent off the marked retail price. If during a special sale an additional 20 percent were to be deducted from the discount price; what would be the lowest possible price of an item marked retail price is Tk. 260? Correct Answer Tk. 145.60 এই Math টিতে 'discount' এর উপর 'discount' হিসাব করতে হবে। যদি 30% off থাকে , তবে (100 - 30) = 70% price এ বিক্রি হচ্ছে। so 30% discount এর জন্য 260Tk হবে = 260 × .70 = 182 Tk. আবার, এই discount price এর উপর 20% discount = 182 × .80 = 145.60 টাকা

Explanation:

Druing a special promotion, a certain filling station is offering a 10% discount on gas purchased after the first the first 10 gallons. If Kim purchased 20 gallons of gas, and Zeni purchased 25 gallons of gas, then Zeni's total per-gallon discount is what percent of Kim's total per-gallon discount? Correct Answer 120% আমাদের কেবল বের করতে হবে কতটুকু পরিমাণে তারা discount পাবে। Actual discount percent নিয়ে চিন্তা না করলেও হবে, যেহেতু, ভাগ করার সময় percentage (10%) বাদ হবে Zeni 25 gallon এর মধ্যে 15 gallon এবং Kim 20 gallon এর মধ্যে 10 gallon discount পায়। তাহলে Kim এর সাপেক্ষে।

Explanation:

How many females were awarded the title 'Beer Protik' for their contribution in the Liberation War of Bangladesh? Correct Answer 4 ৪২৬ জন বীরপ্রতীক খেতাব প্রাপ্তদের মধ্য থেকে নারী বীরপ্রতীক দুজন৷

Explanation:

which of the following is the ratio of the sides of a right angled triangle ? Correct Answer 13:12:5 ধরি, চতুর্থ সমানুপাতিকটি x প্রশ্নমতে, 3 : 9 = 4 : x ⇒39  =  4x  ⇒3x = 36 ⇒x = 12

Explanation:

Mujahid can do a work in 8 days, while has colleagues Asad takes 12 days and Mithun takes 16 days to complete the same.Mujahid and Asad started the work and after few days Asad left the work keeping it incomplete. Rest of the work was completed by Mujahid and Mithun in 2 days.How long it took to complete the whole work? Correct Answer 5 days ধরি, মোট কাজের পরিমাণ = একক। [8, 12 এবং 16 এর ল. সা. গু] মুজাহিদের দক্ষতা = 488 = 6 ∴আসাদের ,, = 4812 = 4 ∴  মিঠুনের ,, = 4816 = 3 ধরি, সম্পূর্ণ কাজ করতে তাদের x দিন সময় লাগে। প্রশ্নমতে, (x – 2) (6 + 4) + 2(6 + 3) = 48 ⇒10(x – 2) + 18 = 48 ⇒ 10x – 20 + 18 = 48 ⇒10x = 50 ∴ x = 5

Explanation:

How many hours should be added from Greenwich time to get Bangladesh time ? Correct Answer 6 hours In computer user interfaces, a cursor is an indicator used to show the current position for user interaction on a computer monitor or other display device that will respond to input from a text input or pointing device. The mouse cursor is also called a pointer, owing to its resemblance in usage to a pointing stick.

Explanation:

The following passages consist of six sentences . The first (s1) and the sixth (s6) sentences are given in the beginning. The middle four sentences in the passage have been jumbled up. These are labeled p. q, r and s. you are required to find out the proper sequence for these four sentences P, Q, R and S. The proper sequence should be__ Correct Answer RPQS A is the answer "one extemporizes" means he composes text without preparation. Similarily ones improvises a score means he composes a score without preparation.

Explanation:

which of the pairs of persons are the immediate neighbor of P ? Correct Answer O,Q এই ধরনের math করতে ছবি একে ফেলুন direction দেখে দেখে। এই ক্ষেত্রে নিচের ছবিটি হবে।

Explanation:

Each of the following questions consists of a word or phrase which is italicized bold in the sentence given . It is followed by certain words or phrases. Select the word or phrase which is closest to the opposite in meaning of the italicized bold word or phrase. The palace was indeed grotesque. Correct Answer decent laconic(adjective) Synonyms: terse, pithy, concise. Antonyms: loquacious, verbose, bombastic, long - winded.

Explanation:

[At 6.15 kilometers (3.8 miles) in length, the Padma Bridge is a landmark structure and one of the longest river crossings in the world.]

Explanation:

[বাংলাদেশ - ভারত সীমানা, আঞ্চলিকভাবে আন্তর্জাতিক সীমানা (আইবি) বলা হয়, এটা বাংলাদেশ এবং ভারতের মধ্যে চালু আন্তর্জাতিক সীমানা, যেটা বাংলাদেশের আটটা বিভাগ এবং ভারতের রাজ্যগুলোর সীমা নির্ধারণ করেছে। Indian states that share their border with Bangladesh are: - West Bengal, Tripura, Assam, Meghalya and Mizoram.]