amc12真题及答案试卷.docVIP

amc12真题及答案

一、单项选择题（每题2分）

1.If\(\frac{2}{3}\)ofanumberis8,whatis\(\frac{1}{4}\)ofthenumber?

A.4

B.5

C.6

D.8

E.10

答案：B

2.Whatisthevalueof\(x\)intheequation\(3x+7=22\)?

A.5

B.6

C.7

D.8

E.9

答案：D

3.If\(a=3\)and\(b=-2\),whatisthevalueof\(a^2+b^2\)?

A.1

B.5

C.9

D.10

E.11

答案：D

4.Thesumofthefirst10positiveintegersis:

A.45

B.50

C.55

D.60

E.65

答案：C

5.If\(\frac{1}{2}\)of\(\frac{1}{3}\)ofanumberis6,whatisthenumber?

A.12

B.18

C.24

D.36

E.72

答案：C

6.Whatisthevalueof\(\sqrt{49}\)?

A.5

B.7

C.9

D.14

E.21

答案：B

7.If\(x+3=7\),whatisthevalueof\(2x\)?

A.4

B.5

C.8

D.10

E.14

答案：C

8.Theareaofasquarewithsidelength5is:

A.10

B.20

C.25

D.30

E.50

答案：C

9.If\(a=4\)and\(b=3\),whatisthevalueof\(a+b\)?

A.7

B.8

C.9

D.10

E.11

答案：A

10.Thevalueof\(\frac{3}{4}\)of16is:

A.4

B.8

C.12

D.16

E.24

答案：C

二、多项选择题（每题2分）

1.Whichofthefollowingnumbersareprime?

A.2

B.3

C.4

D.5

E.6

答案：A,B,D

2.Whatarethefactorsof12?

A.1

B.2

C.3

D.4

E.6

答案：A,B,C,D,E

3.If\(x+y=10\)and\(x-y=4\),whatarethevaluesof\(x\)and\(y\)?

A.\(x=7,y=3\)

B.\(x=8,y=2\)

C.\(x=9,y=1\)

D.\(x=10,y=0\)

E.\(x=6,y=4\)

答案：A,B,C

4.ThePythagoreantheoremstatesthatinarighttriangle,whatistrue?

A.\(a^2+b^2=c^2\)

B.\(a+b=c\)

C.\(a-b=c\)

D.\(c^2=a^2+b^2\)

E.\(a^2=b^2+c^2\)

答案：A,D

5.Whatarethesquarenumbersbetween1and20?

A.1

B.4

C.9

D.16

E.25

答案：A,B,C,D

6.If\(a=2\)and\(b=3\),whatarethepossiblevaluesof\(a+b\)?

A.5

B.6

C.7

D.8

E.9

答案：A,B,C

7.Thesumoftheinterioranglesofatriangleis:

A.90degrees

B.180degrees

C.270degrees

D.360degrees

E.540degrees

答案：B

8.Whatarethepropertiesofarectangle?

A.Oppositesidesareequal

B.Allanglesare90degrees

C.Diagonalsareequal

D