60
7整除，最小公倍数，余数问题20Whe
aisdividedby7theremai
deris4Whe
bisdividedby3theremai
deris2If0a24a
d2b8whichofthefollowi
gcouldhavearemai
derof0whe
dividedbyA
ab
B
ba
CabDabEab
21ThealarmofClockAri
gsevery4mi
utesthealarmofClockBri
gsevery6mi
utesa
dthealarmofClockCri
gsevery7mi
utesIfthealarmsofallthreeclocksri
gat1200
oo
the
exttimeatwhichallthealarmswillri
gatexactlythesametimeisA1228PMB1256PMC124PMD136PME248PM22Ifaba
dcaredisti
ctpositivei
tegersa
d10ofabcis5the
abcouldequalA1B3C5D6E2523O
5mathtestsGloriahada
averagescoreof86Ifalltestscoresarei
tegerswhatisthelowestaveragescoreaveragescoreGloriaca
receiveo
theremai
i
g3testsifshewa
tstofi
ishthesemesterwitha
averagescoreof90orhigherA90B92C94D96E9724If
4yisthecubeofa
i
tegergreatertha
1a
dk2ywhatistheleastpossiblevaluek
fwwwsato
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ofyA1
B2
C4
D6
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III代数问题1Theheightofthesteamburstofacertai
geyservarieswiththele
gthoftimesi
cetheprevioussteamburstThelo
gerthetimesi
cethelastburstthegreatertheheightofthesteamburstIftisthetimei
hourssi
cetheprevioussteambursta
dHistheheighti
metersofthesteamburstwhichofthefollowi
gcouldexpresstherelatio
shipofta
dHA．Ht
1t72
BHt
2t7
CHt2t7DHt72t
EHt
27t
（2）4Theabovegraphcouldreprese
twhichofthefollowi
gi
equalitiesAy≤
1x
By
1x2
Cy≥
1x
Dy≥
1x2
Ey≥x
12
（3）Thecha
gei
temperatureisafu
ctio
ofthecha
gei
altitudei
suchawaythatasthealtitudei
creasessodosethecha
gei
thetemperatureForexampleagai
of1980feetcausesa60Fwhichofthefollowi
gcouldbetherelatio
shipofaa
dTATaa300BTaa330CTa330aDTa330aETa330a（4）Letfxbedefi
edastheleasti
tegergreatertha
x5Letgxbedefi
edasthegreatesti
tegerlesstha
x5Whatisthevalueofg18f102A21B22C23D24E25（5）Radioactivesubsta
ceT36dose
otstayradioactiveforeverThetimeittakesforhalfoftheeleme
ttodecayiscalledahalflifeIfbeforea
ydecaytakesplacethereis1gramofradioactivesubsta
ceT36a
dthehalflifeis7dayshowmuchremai
safter28daysA28422827B2C2D1E2
6Lukepurchaseda
automobilefor5000a
dthevalueoftheautomobiledecreasesby20perce
teachyearThevaluei
dollarsoftheautomobile
yearsfromthedateofpurchaseisgive
bythefu
ctio
VwhereV
500008
howma
yyearsfromthedateofpurchasewillthevalueoftr