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 Puzzle 1209 Which is heavier, a kilo of feathers or a kilo of steel? [Ref: ZSOU] Hint: This is a Gotcha. Answer: They weigh the same. Puzzle 1210 I have a drawer full of socks. There are 5 socks of each colour, red and green, evenly mixed. In the morning, when it is very dark, I need to pull out a pair of socks of the same colour. How many must I pull out of the drawer to ensure that I have at least one pair of matching socks? [Ref: ZVFI] Hint: I'm after a pair of any colour. Answer: Three socks. Puzzle 1211 Which is larger, 3 raised to the 5th power, 5 raised to the third power? [Ref: ZBSB] © Kevin Stone Hint: Remember that 3 raised to the 5th power is 3 x 3 x 3 x 3 x 3. Answer: 3 raised to 5th power. 3 raised to the 5th power = 243. 5 raised to the third power = 125. Puzzle 1212 A bookworm eats from the first page of an encyclopaedia to the last page. The bookworm eats in a straight line. The encyclopaedia consists of ten 1000-page volumes and is sitting on a bookshelf in the usual order. Not counting covers, title pages, etc., how many pages does the bookworm eat through? [Ref: ZPZW] Hint: Mentally try to see the set of 10 volumes on a shelf. Answer: He eats through 8,000 pages. Remember, when the encyclopaedia is in the correct order on the bookshelf, the first volume is on the left, so the first page is not on the extreme left, nor extreme right. And also remember that he's eating from the first page to the last in a straight line, so doesn't eat either of these 2 pages. The answer will also remain the same if you consider each sheet of paper to be two pages, he will eat 4,000 sheets of paper, which is still 8,000 pages.