Others Maths Puzzle

Let m be the largest positive term of an harmonic progression whose first two terms are 2/5 and 4/9. A real number r satisfying m/2-1/n < r

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Others Other Question

In how many diff ways we can distribute 5 diff balls in 3 diff boxes such that no box is empty? If 2000! = m × 12n and m is not divisible by 12, m and n are integers. Find the 3rd last digit of m?