Awesome Maths Hack

Jesus plus you equals eternal life

√144 = 12. Not 1 + 4 + 4 - 2. So, it doesn't always work

Works only for some roots... 9,16, 36, 49...and more would give wrong results...

That's cheating

Does not work on 36

Nice try but it doesnt work for all numbers. Flawed theory, i got my hopes up tho

Try it with 16, 36, 49…great hack if it’s just luck

2 + 8 + 9 = 19 19 - 2 = 17 Answer = 17

Square root of 9 is 9-2 = 7 ( wrong ) Square root of 49 is 4+9 -2 = 11 ( wrong ) An easier method is to find upper and lower bounds. 10x10 = 100 15x15 = 225 20x20 = 400 e.g. for 289 Last digit 9 can come only from 3x3 or 7x7. Answer: Between 15 and 20 is 17 100<196<225 => 14