All pairs
Find all pairs (m, n) of natural numbers for which is true:
m s (n) = n s (m) = 70,
where s(a) denotes the digit sum of the natural number a.
Your answer:
m s (n) = n s (m) = 70,
where s(a) denotes the digit sum of the natural number a.
Your answer:
You need to know the following knowledge to solve this word math problem:
algebrabasic operations and conceptsnumbersthemes, topicsGrade of the word problem
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