Before you can register, you must answer 3 simple questions. All answers are numbers. If the answer is integer, simply type it in the corresponding field. A fraction must be typed in its simple irreducible form, i.e. 5/2 (neither 2.5, nor 2 1/2).

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How many natural numbers less than 1000 are not divisible by 5 and 7?

A Megamind walked the first half of the trip at 4 km/h and ran the second half at 6 km/h. What is his average velocity?