গাণিতিক ধাঁধা / Mathematical Puzzle

 

উত্তর একটু নিচেই দেখুন

Answer is little below

Answer: 15

Explanation:

Look at The 1st Box : 18+12+20=50

Look at The 2nd Box : 15+10+25=50

Look at The Last Box : ?+30+5=50 or ?=15

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