Others Maths Puzzle

choose the odd one out:

A. Cap B. Turban C. Helmet D. Veil E. Hat

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Others Other Question
Village X has a population of 68000, which is decreasing at the rate of 1200 per year. Village Y has a population of 42000, which is increasing at the rate of 800 per year. In how many years will the population of the two villages be equal?? Two pipes a and b fill a cistern in 15 and 10 hours respectively . Tap c can empty the full cistern in 30 hours . All the three taps were open for 2 hours , when it was remembered that the emptying had left been open, it was then closed . How many hours more would it take for the cistern to be filled? Can somebody explain it in shortcut