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To prove that 61 is a prime number.
3 with remainder 7.
Half of 61 is 30.5. To find half of a number, you divide it by 2. In this case, 61 divided by 2 equals 30.5. This is because half of a number represents splitting it into two equal parts.
To convert a percentage to a decimal divide by 100: 61/3 % = 61/3 ÷ 100 = 6.333... ÷ 100 ≈ 0.0633
61 because you add 33, 55, and 100 to get 183. Then you divide it by how many numbers there are, 3. So that's how you get 61.