Yes this is quite normal. By normal I don't mean that every company or even every second company uses this practice. I just mean that it is nothing to be skep

Yes this is quite normal. By normal I don't mean that every company or even every second company uses this practice. I just mean that it is nothing to be skeptical of. I have completed a few of these for companies over here in London (UK). Sometimes they organise a set time to send you the instructions and expect you to send the working solution by a certain time. I have done this twice and I was given 2 hours to complete the task. The other ones I have completed were not timed, they just advised that I send the working solution within the next few days.