They are numbers of the form 210 + 2*n where n = 1, 2, 3, ... 15.
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The GCF is 30.
211, 223, 227, 229, 233, 239
No. The only even prime number is 2.
240 is a composite number. 240 has factors of 1, 2, 3, 4, 6, 8, 10, 12, 15, 16, 20, 24, 30, 40, 60, 80 and 240. *Note: Any number that is even is always a composite number. The only exception is 2, because its only factors are 1 and itself.
To find 3.5 percent of a number, multiply the number by 0.035. In this instance 0.035 x 240 = 8.4. Therefore, 3.5 percent of 240 is equal to 8.4.