Perplex City: Season 1, Cards #045 - #048

Continuing my Perplex City solutations. Spoilers!

• #045 - Snake Eyes: This 'ogram was immediately recognizable as Albert Einstein, as too the mirror'd quote attributed to him (also hinted at by the card): "I shall never believe that God plays dice with the universe." There's also the teaser, "The Clue is in th", in the upper right corner of the card, a trick I've played in the past too. The card title refers to his quote but also to the image, which is made up of black dice.
• #046 - Sum Shortcut: I am, most assuredly, not a fan of math, but this "sum shortcut" would be, I think, pairing numbers: 1 and 99, 2 and 98, 3 and 97, et cetera et cetera. I'm being told this is "(50 * 100) + 50" (or 5050, the accepted answer) and, more generically, "(n^2 + n) * 1/2". This is apparently some sort of arithmetic progression but, you know what? I find Pokemon evolutions more fascinating than this. 5050. Moving on.
• #047 - Opposites Attract: Relatively simple, though some take a bit of a leap of faith: "Look before you leap" (1) to "He who hesitates is lost" (6), "Don't look a gift horse in the mouth" (2) to "Beware of Greeks bearing gifts." (10), "Too many cooks spoil the broth" (3) to "Many hands make light work" (18), "Never judge a book by its cover" (4) to "Clothes make the man" (8), "Seek and ye shall find" (5) to "It's better to be safe than sorry" (11), "Time waits for no man" (7) to "Haste makes waste" (9), "Curiosity killed the cat" (12) to "Nothing ventured, nothing gained." (17), "Sauce for the goose is sauce for the gander" (13) to "One man's meat is another man's poison" (16), and "Silence is golden" (14) to "The squeaking wheel gets the grease" (15).
• #048 - Pop Words: Without poking around, my guess would be 2000 (A), 1950 (B), 1960 (C), 1980 (D), 1970 (E), and 1990 (F). There's a Guardian article on Dent's book, which suggests I was off a bit: 1990 (A), 1910 (B), 1960 (C), 1920 (D), 1970 (E), and 1980 (F).