Others Maths Puzzle

In how many diff ways we can distribute 5 diff balls in 3 diff boxes such that no box is empty?

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Others Other Question

X is picked up from school by his father daily to go home is a car. One day school leaves before 1 hour. so X starts walking towards his house at 3km/h. As a result they reach home 15 mins before time. Find the speed of his father's car. 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