First, fill in the blanks. (3 points for each space, ***48 points)

1, find a rule to fill in the numbers.

( 1) 1,4,9, 16,( ),36……

(2)2,3,5,8,( ),2 1 ……

2. Answer according to the law of graphic arrangement: (graphic representation)

(1) ○ ●△ ○ ●△ ... 123 is ().

(2) ◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎◎967

Xiao Zhang and Xiao Wang live in the same building, and the stairs between two adjacent floors of this building are the same. Xiao Zhang lives on the fourth floor and takes the 54 stairs to go home. Xiao Wang lives on the eighth floor, and Xiao Wang wants to go home (

) stairs.

One key opens one lock, and now eight keys and eight locks are all messed up. Try again at most () times.

5. A piece of wood is 24 centimetres long and needs to be sawed into a stick with a length of 4 centimetres. It takes 3 minutes for each saw, and it takes 2 minutes to rest after sawing.

) minutes.

6.

One of the three students, Zhang San, Li Si and Wang Wu, did a good deed for the group while others were away. Afterwards, the teacher asked who did the good deed. Zhang San said it was Li Si, Li Si said it wasn't him, and Wang Wu said it wasn't him. One of the three of them told the truth, and the one who did good was (

)。

7.△÷χ = 18 ...2 1, the minimum value of△ is (), and the maximum value is ().

8、△+○=9 , △+△+○+○+○=25 , △=( ) ,○=( )。

9. There is a 45-meter-long runway with two colorful flags at both ends. The PE teacher asked to insert a colorful flag every 5 meters on this runway, and also needed colorful flags (

) surface.

10, Class A, Class B, Class C * * There are 16 1 student. Class A has 2 more students than Class B, Class B has 6 more students than Class C, and Class B has (

) people.

1 1. In a subtraction formula, the sum of the minuend, the subtraction and the difference is 120, and the difference is three times that of the subtraction. Then the difference is (

)。

12. There are 10 red, yellow and blue balls of the same size and texture in the pocket. Touch at least once (

) ball, ensure that at least four balls have the same color.

Second, choose the serial number of the correct answer and fill it in brackets. (4 points for each question, ***8 points)

1, a two-digit number whose sum is 7. If you subtract 27 from this number, the positions of the two numbers are just the opposite. The original two digits are (

)。

a、6 1 B、52 C、43

If you have five cats and eat five fish at the same time, it will take five minutes to finish. At the same speed, 100 cats eat 100 fish at the same time, which requires