allery5, 10, 15, 20 என்ற இடைவெளிகள் 6, 11, 21, 36, 56 என்ற தொடரை உருவாக்குகின்றன. அடுத்த எண் எது?
A76
B86
C81
D80
Answer & Solution
Correct answer: C. 81
இடைவெளிகள் 5, 10, 15, 20 ஆக உள்ளன, எனவே அடுத்த இடைவெளி 25 ஆகும் மற்றும் 56 + 25 = 81.
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