Preliminary examination paper (primary school group)
First, multiple-choice questions. Only one of the four options in the following question is correct. Please write the English letters indicating the correct answers in brackets.
1. formula
Equal to (
)。
(A)3
(B)2
(C) 1
(D)0
2. Fold a batch of paper cranes. It takes half an hour for student A to fold, and it takes 45 minutes for student B to fold. Then students a and b need to be folded together (
)。
12 minutes
15 minutes
18 minutes
20 minutes
3. As shown in the figure below, lay four rectangular strips of paper with a length of 16cm and a width of 2cm vertically on the desktop, and the coverage area of the desktop is (
)。
72 square centimeters
128 cm2
124 cm2
112cm2
4. The ratio of land area to ocean area on the earth's surface is 29: 7 1, of which three quarters of the land is in the northern hemisphere, so the ratio of ocean area in Male and the northern hemisphere is (
)。
(A)284:29
(B)284:87
87:29
(D) 17 1: 1 13
5. The length, width and height of a cuboid are just three consecutive natural numbers, and its volume is equal to twice the sum of all its sides, so the surface area of this cuboid is (
)。
(A)74
148
(C) 150
(D) 154
6. From 10 different nonzero natural numbers with a sum of 55, after taking out 3 numbers, the sum of the remaining numbers is 55.
, the maximum product of the three numbers taken out is equal to (
)。
280 people
270 people
252 copies
(D)2 16
Second, fill in the blanks. (Small question 10)
7. As shown below, a park has two roads, AB = 175m and BC = 125m. To install street lamps on these two sections of roads, it is necessary to install a street lamp at three points A, B and C, and the distance between two adjacent street lamps is equal. At least street lamps should be installed in these two sections.
A.
8. put 5. ? 42? The product of 5×0.63 is written in decimal form.
9. As shown in the following figure, there is a regular triangle with a side length of 1, and the regular triangle surrounded by the three sides is removed for the first time; Remove the remaining three regular triangles for the second time, and remove the triangles surrounded by their midpoint lines respectively; …
After the fourth time, a * * * was removed.
A triangle, the sum of the side lengths of all triangles is
10. When the students were camping, they set up 9 camps. The roads connecting the camps are shown in the picture. Beibei wants to plant a flag for each camp, and requires the flags of adjacent camps to have different colors, so Beibei needs at least.
Tricolor flag If Beibei starts from a battalion, don't go the same way.
(fill in "can" or "can't") to complete this task.
Answer:
First, multiple-choice questions (long-term questions 10, out of 60)
Title number
1
2
three
four
five
six
answer
B
C
D
D
B
A
2. Fill in the blanks (small question 10, out of 40, question 9 and 10, out of 5).
Title number
seven
eight
nine
10
answer
13
3.4? 18? 0 or 3.4 1? 80? 1
40, 12. 1875 or
or
3. Number