Product of two digited number and sum of it's digits in 405, also product of numb er obtained by changing the digits and it's sum of digits is 486, find the number?
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Answer:45
Step-by-step explanation:
Two-digit number is a factor of 405. Going by the options, only 81 and 45 are factors of 405.
Multiplying the number by its sum of digits, the result should be 405.
81 x (8+1) = 81 x 9 = 729
45 x (4+5) = 45 x 9 = 405
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