问题标题：
有几道GMAT数学题弄不懂,1、If1050（是10的50次方）–74iswrittenasanintegerinbase10notation,whatisthesumofthedigitsinthatinteger?2、Ifx>0,then1/[√(2x)+√x]=3、Apositiveintegernissaidtobe“prime-sa
问题描述：
有几道GMAT数学题弄不懂,
1、If1050（是10的50次方）–74iswrittenasanintegerinbase10notation,whatisthesumofthedigitsinthatinteger?
2、Ifx>0,then1/[√(2x)+√x]=
3、Apositiveintegernissaidtobe“prime-saturated”iftheproductofallthedifferentpositiveprimefactorsofnislessthanthesquarerootofn.Whatisthegreatesttwo-digitprime-saturatedinteger?
A,99B,98C,97D,96E,95
陈峻峰回答：
1.Theansweris440
1000...000
-74
-------------
999...926
Soit's9*48+2+6=432+8=440
2.Itcouldalsobewrittenas(√(2x)-√x)/x.
3.TheanswerisD.
"prime-saturated"is(productofalldifferentprimefactor)10,notfit
B.98=2*7*7,14>10,notfit
C.97isprimenumber,definitlynotfit
D.96=3*2*2*2*2*2,610,notfit
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