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1. The ratio between two numbers is 3:4 and their least common multiple is 180. What is the first number?
- A. 15
- B. 15
- C. 15
- D. 15
Answer: Option C
Explanation:
এ ধরনের math করতে হলে নিচের পদ্ধতিটি মনে রাখুন 3 × 4 × x = 180 so x = 15 এবং সেই সংখ্যাটি = 3 × 15 = 45
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