[{"question":"Ako vypo\u010d\u00edtame d\u013a\u017eku kru\u017enice?","answers":["S = 2 * \u03c0 * d","o = 2 * \u03c0 * r","S = 2 * \u03c0 * r","o = 2 * \u03c0 * d"],"correct":"o = 2 * \u03c0 * r","order":"1"},{"question":"\u010co ud\u00e1va kon\u0161tanta \u03c0 ?","answers":["rozdiel o a d","s\u00fa\u010din o a d","podiel o a r","podiel o a d"],"correct":"podiel o a d","order":"2"},{"question":"Ako naz\u00fdvame kon\u0161tantu \u03c0 ?","answers":["Rudolfovo \u010d\u00edslo","van Ceulenovo \u010d\u00edslo","Ludolfovo \u010d\u00edslo","p\u00ed"],"correct":"Ludolfovo \u010d\u00edslo","order":"3"},{"question":"S akou \u010d\u00edselnou hodnotou \u03c0 po\u010d\u00edtame?","answers":["3.15","3.14","3.41","3.1415"],"correct":"3.14","order":"4"},{"question":"Vypo\u010d\u00edtaj d\u013a\u017eku kru\u017enice s polomerom 10 cm.","answers":["60,28 cm","6, 28 cm","31,4 cm","62,8 cm"],"correct":"62,8 cm","order":"5"},{"question":"Vypo\u010d\u00edtaj d\u013a\u017eku kru\u017enice s priemerom 12 cm.","answers":["37,68 cm","75,36 cm","376,8 cm","62,8 cm"],"correct":"37,68 cm","order":"6"},{"question":"Vypo\u010d\u00edtaj polomer kru\u017enice, ak jej d\u013a\u017eka je 157 cm.","answers":["12,5 cm","25 cm","50 cm","15 cm"],"correct":"25 cm","order":"7"},{"question":"Vypo\u010d\u00edtaj priemer kru\u017enice, ak jej d\u013a\u017eka je 251,2 cm","answers":["40 cm","20 cm","80 cm","100 cm"],"correct":"80 cm","order":"8"},{"question":"Vypo\u010d\u00edtaj d\u013a\u017eku lana, ktor\u00e9 je 15kr\u00e1t navinut\u00e9 na valci s polomerom 20 cm.","answers":["18,84 m","188,4 cm","18,84 dm","37,68 m"],"correct":"18,84 m","order":"9"},{"question":"Ko\u013ekokr\u00e1t sa oto\u010d\u00ed koleso priemeru 80 cm na ceste dlhej 200 m?","answers":["pribli\u017ene 70kr\u00e1t","pribli\u017ene 78kr\u00e1t","pribli\u017ene 82kr\u00e1t","pribli\u017ene 80kr\u00e1t"],"correct":"pribli\u017ene 80kr\u00e1t","order":"10"}]