Write this number in BINARY 15 1111 1110 1100 1001

The correct answer is 1111.<br /><br />To convert the decimal number 15 to binary, we can use the method of dividing by 2 and keeping track of the remainders. Here's the step-by-step process:<br /><br />1. Divide 15 by 2: the quotient is 7 and the remainder is 1.<br />2. Divide 7 by 2: the quotient is 3 and is 1.<br />3. Divide 3 by 2: the quotient is 1 and the remainder is 1.<br />4. Divide 1 by 2: the quotient is 0 and the remainder is 1.<br /><br />Now, we write down the remainders in reverse order (from the last division to the first): 1111.<br /><br />Therefore, the binary representation of the decimal number 15 is 1111.