Convert 15 in binary system

The Answer is 1111

Step-by-step explanation:

15 = 2 (7) + 1

7=2 (3) + 1

3=2 (1) + 1

1=2 (0) + 1

look the remainder of division by 2 : 1111 in binary system

verify : 15 = 1 (2^0) + 1 (2^1) + 1 (2^2) + 1 (2^3 = 1+2+4+8=15 ... right

The Answer would be 1111