【網(wǎng)絡綜合-SAT試題】

1.Whichofthefollowingcouldbeavalueofx,inthediagramabove?

A.10

B.20

C.40

D.50

E.anyoftheabove

2.Helpersareneededtoprepareforthefete.Eachhelpercanmakeeither2largecakesor35smallcakesperhour.Thekitchenisavailablefor3hoursand20largecakesand700smallcakesareneeded.Howmanyhelpersarerequired?

A.10

B.15

C.20

D.25

E.30

3.Jo'scollectioncontainsUS,IndianandBritishstamps.IftheratioofUStoIndianstampsis5to2andtheratioofIndiantoBritishstampsis5to1,whatistheratioofUStoBritishstamps?

A.5:1

B.10:5

C.15:2

D.20:2

E.25:2

4.A3by4rectangleisinscribedincircle.Whatisthecircumferenceofthecircle?

A.2.5π

B.3π

C.5π

D.4π

E.10π

5.Twosetsof4consecutivepositiveintegershaveexactlyoneintegerinmon.Thesumoftheintegersinthesetwithgreaternumbersishowmuchgreaterthanthesumoftheintegersintheotherset?

A.4

B.7

C.8

D.12

E.itcannotbedeterminedfromtheinformationgiven.

答案：

1.CorrectAnswer:B

Explanation:

Themarkedangle,ABCmustbemorethan90degreesbecauseitistheexternalangleoftriangleBDC,andmustbeequaltothesumofanglesBDC(90)andDCB.AlsoABCisnotastraightlineandmustbelessthan180.Therefore90<5x<180Theonlyvalueofxwhichsatisfiesthisrelationis20.

2.CorrectAnswer:A

Explanation:

20largecakeswillrequiretheequivalentof10helpersworkingforonehour.700smallcakeswillrequiretheequivalentof20helpersworkingforonehour.Thismeansifonlyonehourwereavailablewewouldneed30helpers.Butsincethreehoursareavailablewecanuse10helpers.

3.CorrectAnswer:E

Explanation:

Indianstampsaremontobothratios.Mul

ltiplybothratiosbyfactorssuch

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