## JamesR4494 Group Title How do I find the square root of 169? one year ago one year ago

1. ParthKohli Group Title

You can see and tell that it is $$\pm 13$$

2. Jamierox4ev3r Group Title

just divide 169 by 13 because 13*13 equals 169.

3. Jack1 Group Title

for another way, look up "Newton-Raphson" method... long winded but will work out all square roots for you, eg sqrt 3, sqrt 168

4. JamesR4494 Group Title

How would I find out that it's 13x13?

5. Jamierox4ev3r Group Title

square roots are just something i memorize

6. JamesR4494 Group Title

Is that the only way? to memorize?

7. Jamierox4ev3r Group Title

or there is also jack's way, but it is very long winded

8. JamesR4494 Group Title

:c

9. Jack1 Group Title

guesstimating you know 10^2 = 100, so must be bigger you know 15^5 = 225, so must be smaller, leaves a range of 4 possibilities

10. Hunus Group Title

Also, you know that it must end with either a three or a seven. And since you know it has to be greater than 10 and less than 15 your only choice is 13

11. Jack1 Group Title

or you could get a pile of 169 rocks, and see how many even piles of the same number of rocks as piles you can split them in to...?

12. Jamierox4ev3r Group Title

jack that would take a lot of time lol :)

13. AonZ Group Title

type in calculator derp?

14. 00015935 Group Title

13