m4maths Maths Puzzle

If 8 men 8 hours per day works for 8 days get 45/- then how many men required if the work is 5 hours per day for 10 days they get 60/-?

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m4maths Other Question

If we consider the permutation of 7 numbers then what is the order of (1457)(236) Complete the series: 5, 20, 24, 6, 2, 8, ?