Khan/khan-exercises — Issue #9074: Significant figures 1 - Leading zero counted wrong in Significant Figures 1
Author: KhanBugz
Created: 2011-12-20 10:19:03+00:00
State: open
Labels: firefox, win7, wrong-or-unclear

Alright it's a programming mistake. The program either counts all leading zeros beeing typed or does not recognice them to be counted as in 0.054262. Hence not proving wheter there are two leading zeros infront of the decimal point or wheter the zero is right infront of a bigger Number like 06238.8135.
Plus it's unclear whether trainling zeros are to be counted or not. You'd probably write them out in scientific tables where every data has to be exact to a certain number behind the decimal point (5.8847, 68.0940, 53.3000, 2.5456) but when you do only have one number you could easily imagine 5.60 beeing 5.6000 or 5.6000000000000000 not meaning all those trainling zeros are significant.

[significant_figures_1.html?seed=141&problem=0](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/significant_figures_1.html?seed=141&problem=0&debug)

[Answer timeline](http://sandcastle.khanacademy.org/media/castles/Khan:master/exercises/significant_figures_1.html?seed=141&problem=0&debug&activity=%5B%5B%22incorrect-activity%22%2C%22%5C%227%5C%22%22%2C12%5D%2C%5B%22hint-activity%22%2C%220%22%2C7%5D%2C%5B%22hint-activity%22%2C%220%22%2C8%5D%2C%5B%22hint-activity%22%2C%220%22%2C23%5D%5D)

["7"]

Mozilla/5.0 (Windows NT 6.1; WOW64; rv:8.0) Gecko/20100101 Firefox/8.0

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