Select the option that is related to the third number in the same way as the second number is related to first number and the sixth number is related to the fifth number.
37: 40 :: 49 : ? :: 69: 45
The difference of square of second digit of first number and square of first digit of first number = second number. (7² - 3²) = 49 – 9 = 40. The difference of square of second digit of fifth number and square of first digit of fifth number = sixth number. (9² – 6²) = (81 – 36) = 45. Similarly, The difference of square of second digit of third number and square of first digit of third number = fourth number (9² – 4²) = (81 – 16) = 65.
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