LOL - this was a fun one. Thanks, c. i. - I really enjoyed it. Some of 'em I did hafta ponder a bit. Naturally, I
DO have a few nits to pick - nobody surprised by that, I imagine
For #7, the answer would depend on what you considered a "Standard Pack" - a typical book of cardboard matches, or one of the various packaging schemes employed for wooden matches? Cardboard book matches commonly are 20 matches per book, though 10, 30, and 40 are not uncommon configurations. Wooden"Kitchen" matches typicaly are retailed in individual 250-count containers, and the smaller wooden "Penny Matches" most often are sold in 50-count or 100-count units.
There's no real answer for #9 either; technically, the FM ("Frequency Modulation'") Broadcast Band is 88MHz to 108 MHz, however in North America, FM broadcast stations are regulated to lay between 87.9 MHz and 107.9 MHz. Typically, higher-end home FM tuners will show - and tune to - a lowest number of 87.5, while portable and automobile receivers will usually have a lowest number of 87.7, and if that isn't confusing enough, the Japanese FM Broadcast band is the much narrower spectrum between 76 Mhz and 90 MHz, while an even narrower spectrum, 66 MHz to 74 MHz, was used in the Soviet Union and the Warsaw Pact nations, but all have adopted the current European standard since the fall of the Soviet Union. The Western FM broadcast band lies between standard VHF television channel 6 (the audio for which is at 87.75 MHZ) and the frequencies immediately above 108 which are allocated to aircraft navigation and communication - interestingly, chiefly in the AM, or Amplitude Modulation, broadcast mode.
Finally, the "which way does water drain in which hemisphere" thing is a myth; the direction of the drainflow vortex is dependent upon the residual motion of the water in the contanier, the shape of the container, and the positioning of the drain outlet relative to the surfaces of the container and that of the liquid contained therein, so there's no "right answer" for #11, either.
I have no idea what decorates the reverse of Canadian coins, or, for that matter, their obverse, I'm sorry to admit. Of the 24 questions that have definitive answers, I got 22. Without resortin' to any reference aids. Took a while, though.