সকল সরকারী/বেসরকারী পরীক্ষার প্রশ্ন পেতে ক্লিক করুন গণিতের আইকিউ টেস্ট করতে ক্লিক করুন 
If a3 - b3 = 513 and a - b = 3, then ab =?
If a3 - b3 = 513 and a - b = 3, then ab =?
- ক. 54
- খ. 55
- গ. 45
- ঘ. 34
সঠিক উত্তরঃ 54
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