When rounding a decimal number to the nearest whole number, you look at the first decimal place. If the number is 5 or greater, you round up; if it is less than 5, you round down. In this case, 2.42 is closer to 2 than to 3, so when rounded to the nearest whole number, it becomes 2.
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240
Expressed as a surd in its simplest form, sqrt(242) = 11 sqrt(2). Expressed as a decimal, rounded to two decimal places, this is equal to ±15.56.
Half of 242 is 121. To find half of a number, you simply divide it by 2. In this case, 242 divided by 2 equals 121. This can be calculated by long division or by mentally halving the number.
121. Odd.
1 x 242 = 242 2 x 121 = 242 11 x 22 = 242 22 x 11 = 242 121 x 2 = 242 242 x 1 = 242