Cross multiplication : বজ্রগুণন;
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Appropriate Prepositions
Answerable to (কারো কাছে জবাবদিহিতা করা): He is not answerable to anybody for his mistake.
Convinced of (আশ্বস্ত): You are convinced of his product.
Depend upon (নিশ্চিত থাকা, আস্থা রাখা): Sumi depended upon his word.
Die for (আত্নত্যাগ করা): Our Chairman died for our country.
Send for (ডেকে পাঠানো): Send for a doctor immediately.
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Idioms
Foul play (অসদাচারণ করা): We feared that he had met with foul play.
Null and void (বাতিল): The deed has been null and void now.
Short temper (রগচটা)— He is a man of short temper.
Silver living (hope- আশা বা ভালো দিক): Every cloud has a silver lining.
Tooth and nail (তীব্রভাবে): He fought tooth and nail for the sake of country.