SAT考试数学练习题2
来源91SAT考试网时间2009年08月20日
1Iffx│x50│whatisthevalueoff5A75B25C0D25E752√2√3A52√6B5√6C12√6D1√2E13230230230230A8120B830C232D230E226
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ecti
gthesetow
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o
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o
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A10B8C6D4E2
f5I
thefigureaboveAD4AB3a
dCD9Whatistheareaoftria
gleAECA18B135C9D45E3
答案：1CorrectA
swerBExpla
atio
Ifx5the
x50255025Butthesig
│x│mea
stheabsolutevalueofxthedista
cebetwee
the
umbera
dzeroo
the
umberli
eAbsolutevaluesarealwayspositive│25│252CorrectA
swerAExpla
atio
Expa
dasforab2√2√3√2√322√2√3352√63CorrectA
swerCExpla
atio
Allfourtermsareide
ticalthereforewehave4230But422a
dsoweca
write22230Whichisequivale
tto2324CorrectA
swerBExpla
atio
Amyca
travelclockwiseora
ticlockwiseo
thediagramClockwiseshehas
ochoiceofroutefromAtoBachoiceofo
eoutoftworoutesfromBtoCa
dachoiceofo
eoutoftworoutesfromCbacktoAThisgivesfourpossibleroutesSimilarlya
ticlockwiseshehasfourdiffere
troutesTotalroutes85CorrectA
swerDExpla
atio
IfwetakeAEasthebaseoftria
gleAECthe
theheightisCD
fTheheightofthetria
gleistherefore9give
Tofi
dthebasewe
eedtoseethattria
glesAEBa
dCDEaresimilarTheratioABCDisthereforeequaltotheratioAEEDThegive
i
formatio
showsthattheratiois39or13Nowdividi
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thisratiogivesusAEas1TheareaofAECbasexheight12x945
SAT考试数学练习题3
来源91SAT考试网时间2009年08月20日
1Whichofthefollowi
gcouldbeavalueofxi
thediagramaboveA10B20C40D50Ea
yoftheabove2Helpersare
eededtoprepareforthefeteEachhelperca
makeeither2largecakesor35smallcakesperhourThekitche
isavailablefor3hoursa
d20largecakesa
d700smallcakesare
eededHowma
yhelpersarerequiredA10B15C20D25E303Joscollectio
co
tai
sUSI
dia
a
dBritishstampsIftheratioofUStoI
dia
stampsis5to2a
dtheratioofI
dia
toBritishstampsis5to1whatistheratioofUStoBritishstampsA51
fB105C152D202E2524A3by4recta
gleisi
scribedi
circleWhatisthecircumfere
ceofthecircleA25πB3πC5πD4πE10π5Twosetsof4co
secutivepositivei
tegershaveexar