self Maths Puzzle

Find nine single-digit numbers other than (1, 2, 3 and 9) with a sum
of 45 and a product of 9!

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self Other Question

Let n be the number of numbers divisible by 8 out of all four digit numbers that can be formed with the digits 4,5,6,7,8, no digit being repeated in the numbers. What is the vale of N. remainder when 63^83 +8^83 divided by 49??? Approach????