Select the option that is related to the third number in the same way as the second number is related to the first number.
15 : 5 :: 26 : (?)
We will add the digits of first number and then subtract first digit with it. 15 : 5 → (1 + 5) = 6; 6 – 1 = 5 26 → (2 + 6) = 8; 8 – 2 = 6
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