After first hour, 50 * 2 = <<50*2=100>>100 ants.
After the second hour, 100 * 2 = <<100*2=200>>200 ants.
After the third hour, 200 * 2 = <<200*2=400>>400 ants.
After the fourth hour, 400 * 2 = <<400*2=800>>800 ants.
After the fifth hour, 800 * 2 = <<800*2=1600>>1600 ants.
#### 1600