This is a pretty cool course. The tonal "pick which frequency this sine wave is" questions became easier when I realised they were just using one, three and five in Amin (IIRC). Once you get where your "tonic" is it becomes a different exercise. Pulling a band out of pink noise it tough, but I got better with practice (imagine that).
One weird thing, on the actual test my question 10 was a "tell which frequency we pulled out of this pink noise" question and after several A/B passes at the original I swore they were the same so I opened up a frequency analyzer and looked and sure enough, the before and after both were the same sample with a specific band removed. Oops...but hey, at least I spotted it :)
Thanks to the OP for the heads up about this. It's pretty cool...
Dean