49 மற்றும் 36 ஆகிய வர்க்கங்களுக்கு இடையிலான இடைவெளி என்ன?
A13
B12
C11
D14
Answer & Solution
Correct answer: A. 13
அடுத்தடுத்த வர்க்கங்களான n² மற்றும் (n-1)²-க்கு இடையிலான இடைவெளி 2n - 1 ஆகும்; n = 7 எனும்போது இது 13 ஆகும்.
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