[Author: Li Fuzuan reposted from: clicks: 893 Update time: March 25, 2005 article entry: kkkkkkkk]

Examination paper of junior one mathematics competition

Grade classification name

1. Fill in the blanks: (5 points for each small question, * * * 30 points)

x+y=5

1, given the equation y+z=6, then 2002(x+y+z)= 1

z+x=7

2. When a2+a=0, the value of a200 1+a2002+ 12 is.

3. If the sum of two natural numbers is 100, the maximum value of the product is.

4. From 1: 45 to 2: 05, the turning angle of minutes is.

5. If the complementary angle of an angle is x0, then the complementary angle of this angle is degrees. (900 x > 0, then the value range of a is ().

2x-y= 1

a-3 < a < 2b 2 < a < 5c 1 < a < 4d-4 < a < 1

2. Calculation-= ()

D 250 a 62500 B 1000 C 500

3. Given that xn=2 and yn =3, the value of (x2y)2n is ().

A 48 B 72 C 144 D cannot be determined

4. In the following forms of numbers (no matter what natural number N takes), the one that is definitely not the square of a natural number is ().

a3(N2-n+ 1)b5(N2-n+ 1)C7(N2+n+ 1)d9(N2+n+ 1)

5. Observe the graph below and read the related text below the graph. Like this, the number of intersections where ten straight lines intersect the most is ().

Two lines intersect, three lines intersect, four lines intersect,

Up to 1 intersections. Three intersections at most. Six intersections at most.

A 40 B 45 C 50 D 55

6. As shown in the figure, if parallel straight lines EF and MN are in phase with intersecting straight lines AB and CD.

Cross, then the figure * * * has the same inside angle ()

A 4 to B 8 to C 12 to D 16.

Third, answer questions.

1, the known rational numbers x, y and z satisfy x-y=8, xy+z2=-16.

Verification: x+y+z=0 (in 10)