Figure logic
I like math and logic puzzles, so I got myself a copy of Math & Logic Problems by Dell Magazines. The magazine opens with a so-called figure logic puzzle, which is basically a crossword puzzle with numbers instead of words, and with clues like “5-Across plus 5-Down” or “One-third of 19-Across”. Of course, the clues to 5-Across and 5-Down and 19-Across mention other numbers, so you end up with one big circular reference. The trick is to find a few numbers or digits to start with and then the rest of the puzzle will fall into place. For example, if 5-Across and 5-Down are both two-digit numbers, and “5-Across plus 5-Down” has three digits, you know the first of those three digits must be a one. This unlocks a digit in another number, and so on and so forth.
The magazine contains some text like that, which is of course fine for the benefit of people unfamiliar with this kind of puzzle. It’s the next paragraph that has me worried that the puzzles are going to be too easy. I’ll quote it in full — if you’re a geek like me, you’ll appreciate it.
NOTE: A square of a number is that number multiplied by itself. For example, the square of 6 is 36 (6 × 6 = 36). A square root is a number whose square is the given number (6 is the square root of 36). A cube of a number is that number multiplied by itself and multiplied by itself a second time (27 is the cube of 3, since 3 × 3 × 3 = 27). A product is the number resulting from the multiplication of two or more numbers (24 is the product of 6 and 4). A multiple is a number that is the product of a specific number and another number (30 and 24 are both multiples of 6, since 6 × 5 = 30 and 6 × 4 = 24). A factor is a number that divides evenly into another number (4 is a factor of 12). A prime number is a positive whole number which is divisible only by 1 and itself (for example, 2, 3, 5, and 7 are prime numbers). A palindrome is a number that reads the same forwards and backwards.
Does this mean the difficulty level of the puzzles will be targeted at people who don’t know what a square or a prime is? I hope not, because that’s not going to be much of a challenge for me. Also, I think someone unfamiliar with basic algebra is unlikely to pick up a magazine titled Math & Logic Problems. Even if they did, this text would scare them off rather than encourage them to try their hand at some of the puzzles. Why, then, did the editors include this at all?
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