Can I ride on 15 spokes instead of 16? On my way to work this morning, one of the spoke on my front-wheel broke. I removed it completely, leaving me with 15 spokes instead of 16. 

Can I still ride my bike over a 20km distance. I noticed the question was asked before, but I wasn't sure if it was also applicable to a wheel with a lower amount of spoke.
You shouldn't ride on a wheel with broken spokes more than necessary, especially if its a low spoke count wheel (like a 16 spoke wheel). The load gets unbalanced with respect to the other spokes. 

Since this is a front wheel, I wouldn't risk riding it. If something does happen to the wheel (such as failure) its far more serious than if it happened to the rear wheel (you can recover from rear wheel failure; recovering from front wheel failure may require you finding your teeth on the side of the road).