已知一個五位數abcde是由五個相異的數碼1、3、5、7、9所組成（但

已知一個五位數abcde是由五個相異的數碼1、3、5、7、9所組成（但不一定依此順序），已知它的前兩位數ab與末兩位數 de 之乘積減去中間的數c 恰好等於一個各位數碼都相同的四位數。請問滿足上述條件的最大五位數是什麼？

ผลลัพธ์ (อังกฤษ) 1:

Given a five digits abcde is comprised of five different digital 1, 3, 5, 7, 9 composed by (but not necessarily in this order), its last two digits AB is known with the end of the two-digit product minus the middle of de c is equal to exactly one question digital will be the same four digits. What's the maximum number of five meets the above criteria?

ผลลัพธ์ (อังกฤษ) 2:

Given a five-digit abcde is composed of five different digital 1,3,5,7,9 composed (but not necessarily in that order), it is known the first two digits and the last two digits of de ab subtracting the product of the number of middle c is exactly equal to a digital you have the same four digits. What is the maximum number of five Will meet the above criteria is?

ผลลัพธ์ (อังกฤษ) 3:

Known five figure abcde are comprised of five different digital 1, 3, 5, 7 and 9 (, but not necessarily according to this order), known its first two figure ab subtracts middle number c to be equal to digital same four figures with end the products of two figure de exactly. What satisfies the above condition the biggest five figures is?