
http://en.wikipedia.org/wiki/Abacus (5 years and 2705 days ago)
Pound, shilling and pence ![]() by friiskiwi 9195 views - final score: 69.8% | Correct answer ![]() by Remsphoto 8435 views - final score: 68.4% | My first scientific calculator ![]() by MarcosSanchez 10593 views - final score: 66.5% |
Bills, bills and more bills ![]() by friiskiwi 5588 views - final score: 65.6% | Counting Change? ![]() by kyricom 5846 views - final score: 65% | Basics ![]() by kyricom 2606 views - final score: 64.6% |
old and the new ![]() by meatman 4168 views - final score: 63.3% | Just another Day at Work ![]() by Alan2641 5075 views - final score: 62.9% | everest z5 ![]() by lincemiope 3585 views - final score: 62.8% |
Geometry ![]() by friiskiwi 2948 views - final score: 62.3% | abacus ![]() by lincemiope 2956 views - final score: 61.7% | Jai Prakash Yantra - Janthar Manthar, Jaipur India ![]() by awinibhat 11524 views - final score: 60.7% |
Sundial ![]() by awinibhat 4814 views - final score: 59.9% | chess ![]() by lincemiope 5484 views - final score: 58.3% | PI ![]() by teecee 2021 views - final score: 54.3% |
Howdie Guest!
You need to be logged in to rate this entry and participate in the contests!
LOGIN HERE or REGISTER FOR FREE
Oh! Now you're back in time ...
not believe.
I miss from China for 10 years, but all used the 'schedule, and I had also learned how to make simple calculations
the binary system is very convenient, and is the basis of computing
thnak for the comment
Howdie stranger!
If you want to rate this picture or participate in this contest, just:
LOGIN HERE or REGISTER FOR FREE