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The primes are 23, 29, and 31.
There are three: 23, 29 and 31
The median is the middle number when the numbers are listed in order; if there is an even number of numbers, the median is the mean of the middle two. 35,380 - two numbers - two is even, therefore median is the mean of the middle two, ie the mean of 35 and 380: median = (35 + 380) ÷ 2 = 207.5
The numbers between 20 and 40 are 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, and 39. These numbers form a consecutive sequence with a common difference of 1. Mathematically, this can be represented as {x | 20 < x < 40}.
None. If you add two even numbers, you'll end up with another even number.