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একটি পানিপূর্ণ কুয়ার গভীরতা 20m ও ব্যাস 2 m. কুয়াটিকে পানি শূণ্য করার জন্য 5 HP এর একটি পাম্প লাগানো হল। অর্ধেক পানি তোলার পর পাম্পটি নষ্ট হয়ে গেল। বাকি পানি তোলার জন্য একই ক্ষমতা সম্পন্ন আর একটি পাম্প লাগানো হল। প্রথম পাম্প দ্বারা সম্পাদিত কাজের পরিমান নির্ণয় কর।(The depth and diameter of a water filled well are 20 m and 2 m respectively. An engine of 5 HP is attached to pump out the water. The pump was ruined after emptying half of the water. Then another pump of same capacity was attached to pump out rest of the water. Determine the work done by first pump.) 
A 2.54 × 104 J
B 1.44 × 104 J
C 2.34×104 J
D 1.54 × 104 J
E 1.54 ×104 J
Which of the following pictures was depicted in the first postage stamp of Bangladesh after the Liberation war in 1971?
A Water Lilly flower
B Jackfruit
C Royal Bangal Tiger
D Martyr Monument
In Sajib's collection, Bangladeshi stamp is 3 times more than the stamps of other countries . Which of the following cannot be the number of stamps in Sajib's collection ?
A 96
B 72
C 54
D 32
Which one of the five is least like the other? STAMP-PEN-ENVELOPE-BOOK-MAIL
A Pen
B Book
C Mail
D None of these
One who collects postage stamp called-
A Stamp collector
B Vendor
C Lexicographer
D Philatelist
In July 2021 , the country which issued a postage stamp featuring Bangabandhu is-
A India
B Australia
C Turkey
D Brazil
We shall accept the stamp at its face value -
A exact price
B low price
C high price
D none
We shall accept the stamp at its face value _____ .
A exact price
B intarrogate
C interoget
D interrogate
মুজিব বর্ষ উদযাপনের জন্য কোন দেশ নতুন ডাকটিকিট প্রকাশ করে?(Which country has published new stamp to celebrate the "Mujib Barsha"?)
A Kongo
B Sierra Leone
C Nigeria
D Ghana
In a certain code language, "MASTER" is written as "682145" and "STAMP" is written as "21869". How is "PASTE" written in that code language?
A 82145
B 98214
C 69218
D \95184

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