Have you got any ideas on the right way to solve this?(((
 

Sorry for off-topic, I'm thinking about making an instructive site for kids. Will possibly begin with posting interesting facts like"Mercury is the only planet whose orbit is coplanar with its equator."Please let me know if you know where I can find some related information and facts like here

http://www.finanseportal.pl/mezhduna...y-v-avstralii/
http://advancedacademics.com/french-...zskogo-jazyka/
http://www.newayajin.com/newayajin/m...ipendii-kursy/
http://ewawojciechowska.pl/home/sove...-ssha-plakaty/
http://theyellowdoor.it/vse-chto-my-...avstralija-do/