30.5
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30.5
A prime number is one which cannot be evenly divided by any prime number 61 ÷ 2 = 30 +1 61 ÷ 3 = 20 +1 61 ÷ 5 = 12 +1 61 ÷ 7 = 8 + 5 As the square root of 61 lies between 7 and 8, there is no need to take the division further than this... any prime number which might have divided it would give a result lower than the number we have already tried. So, yes! 61 is a prime number.
Calculate the LCM of 2, 3, 4, 5, 6 and add 1 to get the answer: 61
488 = 2 * 2 * 2 * 61
61 x 0.02 = 1.22