book Maths Puzzle Numerical Ability

What is the mathematical average of the number of weeks in a year, seasons in a year, and the number of days in January? Please can I get a detailed explanation.Thanks

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The sum of two students 3 scores=212. If the 1st is 22 points more than the second, and the sum of the first 2 is 14 more than twice the third. Whats the first score? Technology: Driving down a mountain Tom finds that he has descended 1800 ft in elevation by the time he is 3.25 miles horizontally away from the top of the mountain. Find the slope of his descent to the nearest hundredth.