小学六年级经典奥数试题及答案（二）小学六年级奥数

1、 小学六年级经典奥数试题及答案（二）小学六年级奥数 【编者按】为了丰富同学们的学习生活，小学为同学们搜集整理了-xxxx年小学六年级经典奥数试题及答案（二），供大家参考，希望对大家有所帮助! xxxx年小学六年级经典奥数试题及答案（二） 1、didyouknow?inthedecimalnumbersystem(base10)tendifferentdigits,0to9,areusedtowriteallthenumbers.inthebinarynumbersystem(base2)twodifferentdigitsareused,i.e.0and1. whichoneofthefoll

2、owingnumbersisnotavalidnumberinthe octalnumbersystem(base8)? a)128b)127c)126d)125e)124 2、thenumberofdiagonalsthatcanbedrawninaregularpolygonwith twentysides(icosagon)is_. 3、ifaandbareintegers,10?3=1,152?7=3,andthen379?6isequalto_. 4、twonumbersareintheratio2:3.when4isaddedtoeachnumbertheratiochangest

3、o5:7.thesumofthetwooriginalnumbersis_. 5、thegreatestnumberofmondayswhichcanoccurin45consecutive daysis_ 6、saulplaysavideogameinwhichhescores4forahitandlost6foramiss.after20roundshisscoreis30.thenumberoftimeshehasmissedis_. 7、threegirlsa,bandcrunina100mrace.whenafinishes,bis10m behindaandwhenbfinishe

4、scis20mbehindb.howfarinmetreswascfromawhenafinished?(letsassumealltheathletesrunataconstantspeed) 8、theareasofthefacesofarectangulaboxare84cm2,70cm2and30cm2.thevolumeoftheboxincm3is_. 9、youhave3weights:1kg,3kgand9kgaswellasanequalarmbalance,asshown.howmanydifferentweightobjectscanyouweighwiththesethree? remembertheweightsmaybeplacedoneitherside 参考答案： 1、a考察我们学过的简单的进制问题，显然8进制中没有8出现 2、170找规律，公式为n(n-3)2 3、1定义新运算，就是求3796的余数。 4、40，16和24 5、7 6、5 7、28米，根据距离比求出速度比，三者的速度比为