Which number will be placed at the sign of interrogation ? 

A  20 

B  25 

C  26 

D  75 

Solution

Correct Answer: Option C

 এখানে Sequence টি নিম্নোক্তভাবে গঠিত হয়েছে । 

 প্রথমটি  2 + 4 = 4 + 16 = 20 

 দ্বিতয়টি 3 + 9 = 9 + 81 = 90 

 তৃতীয়টি 1 + 5 = 1 + 25 = 26 

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