Complete a sequência. 3,6,12 ,24, square

This is a simple sequence problem. The pattern appears to be that each number is double the previous number. So, starting with 3, the next number is 6 (which is 3*2), then 12 (which is 6*2), then 24 (which is 12*2). Following this pattern, the next number in the sequence would be 24*2, which is 48.