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0 থেকে 9 সংখ্যা আলোকিত করার জন্য সর্বমোট কয়টি LED এর প্রযোজন হয়?

সঠিক উত্তর: 7

What is the difference between a CFL and an LED Lamp?
1. To produce light, a CFL uses mercury vapour and phosphor while an LED lamp uses semi-conductor material.
2. The average life span of a CFL is much longer than of an LED lamp.
3. A CFL is less energy efficient as compared to an LED lamp.
Which of the statements given above is/are correct?

কোন সম্পদ অর্জন করার জন্য বারবার চর্চা করার প্রয়োজন হয়?

In the following question below are given some statements followed by some conclusions. Taking the given statements to be true even if they seem to beat variance from commonly known facts, read all the conclusions and then decide which of the given conclusion logically follows the given statements. Statements:
I. All LED are bulb.
II. Some bulbs are not tube light. Conclusions:
I. Some tube lights are LED.
II. All LED are tube lights.

A passage is given with five questions following it. Read the passage carefully and select the best answer to each question out of the given fouralternatives. He wasn't the first, nor would he be the last, but the wiry, bespectacled man from Gujarat is certainly the most famous of the world's peaceful political dissidents.Mohandas Gandhi – also affectionately known as Mahatma – led India's independence movement in the 1930s and 40s by speaking softly without carrying much ofa big stick, facing down the British colonialists with stirring speeches and non-violent protest. More than anything else, historians say, Gandhi proved that one manhas the power to take on an empire, using both ethics and intelligence. Urges Britain to quit India It is hard to imagine the thin, robed Gandhi working in the rough and tumble world of law, but Gandhi did get his start in politics as a lawyer in South Africa, where he supported the local Indian community's struggle for civil rights. Returning to India in 1915, he carried over his desire to improve the situation of the lower classes. Gandhi quickly became a leader within the Indian National Congress, a growing political party supporting independence, and traveled widely with the party to learnabout the local struggles of various Indian communities. It was during those travels that his legend grew among the Indian people, historians say. Gandhi was known as much for his wit and intelligence as for his piety. When he was arrested several more times over the years for his actions during the movement,Gandhi calmly fasted in prison, believing that his death would embarrass the British enough to spur independence, which had become the focus of his politics by1920. Gandhi's non-cooperation movement, kicked off in the early 1920s, called for Indians to boycott British goods and traditions and become self-reliant. His mostfamous protest came in 1930, when Gandhi led thousands of Indians on a 250-mile march to a coastal town to produce salt, on which the British had a monopoly. What led to the growth of legend of Mahatma Gandhi among the Indians?

Consider the given argument and decide which of the given assumptions is (are) implicit. Argument : A top television company announced up to 50% discount on their new launch of LED TV. Assumptions : 1. The sales of the LED TV may increase. 2. The company will become the top seller of the LED TV.

আরিফ স্টেশন P থেকে Q তে যাওয়ার জন্য ১০ টি টিকেট ক্রয় করলো। টিকেট ক্রয় বাবদ সে মোট ৩৫০০ টাকা খরচ করলো। যদি P থেকে Q তে যাওয়ার জন্য ৫ টি টিকেট এবং P থেকে R এ যাওয়ার জন্য ১ টি টিকেটের একত্রিত মূল্য ৮০০ টাকা হয়, তবে P থেকে Q তে যাবার একটি টিকেটের মূল্য কত টাকা?

১ থেকে ১০০ পর্যন্ত মৌলিক সংখ্যা সর্বমোট কয়টি?

a এর কোন মানের জন্য ভেক্টর 2i + aj - k এরং ভেক্টর 4i - 2j -2k পরস্পরের উপর লম্ব হবে?

যদি কোন একটি পরীক্ষার একজন ছাত্রের অংকে ফেল করার সম্ভাব্যতা ¼, অংকে ও ইংরেজীতে উভয় বিষয়ে পাশ করার সম্ভাব্যতা ⅗ এবং দুটি বিষয়ের কোন একটিতে পাশ করার সম্ভাব্যতা ⅝ হয়, তাহলে ঐ ছাত্রের শুধু ইংরেজীতে পাশ করার সম্ভাব্যতা কত?

অন্ধকার ঘর আলোকিত করতে কী প্রয়োজন?