Search found 2 matches
Search found 2 matches • Page 1 of 1
- Wed Aug 27, 2008 9:25 pm UTC
- Forum: Mathematics
- Topic: Favorite mental math tricks/shortcuts
- Replies: 61
- Views: 9863
Anyone know any cool or useful shortcuts or tips? Some of my favorites: If you know the squares of numbers, this one can be useful: Ex: 12x14 = (13x13) - 1 = 168 24x26 = (25x25) - 1 = 624 To figure out approx one's salary: Wage/hr * 2000 = Salary in one year Ex: $8/hr = $16,000/yr (aka don't drop ou...
- Wed Aug 27, 2008 9:12 pm UTC
- Forum: Science
- Topic: Favorite home experiments
- Replies: 590
- Views: 482537
Pro tip: Following directions from texts from 80's BBS' = not always FTW. My friends and I accidentally created a gas that was toxic, and melted the container it was in... Luckily this was done outside. Still no idea how what reacted to make the gas. Pro tip #2: If you're following the ingredients f...