Time: 60 minutes

The first part knowledge and skills

1. Fill in the blanks (65438+ 0 for each blank, ***35)

1, Unit 2 of Grade Five Mathematics Volume: 3 and 90, () is a multiple of (), and () is a factor of ().

Among the multiples of 2 and 6, the minimum multiple is (), and the maximum multiple of 3 in 100 is (); The largest number in the factor of 28 is ().

Within 3.50, the multiple of 7 is (), and the largest prime number within 20 is ().

4. Numbers in () are multiples of 2;

The number with () in the unit is a multiple of 5.

The number in () is a multiple of 2 and 5.

Numbers that are multiples of 2 and 5 at the same time. At least two digits are (), and at most two digits are ().

5. If the sum of two prime numbers is equal to 24, it can be ()+().

()+() or ()+().

6. A three-digit number whose unit is the smallest prime number, the tenth digit is the smallest composite number, and the hundredth digit is the smallest odd number. This three-digit number is () and a multiple of prime numbers () and ().

7. The sum of three consecutive even numbers is 42, and these three numbers are (), () and () respectively.

8,605 plus at least () is a multiple of 3, 1024 minus at least () is a multiple of 3, so 78 plus at least () is a multiple of 5.

9. A number is a factor of 48 and a multiple of 6. This number may be (), (), (), (), () and so on.

10 and □47□ are multiples of 2, 3 and 5 at the same time. The minimum value of this four-digit number is (), and the maximum value is ().

Second, true or false questions (each question 1 point, * * *1point)

1, because 18÷9=2, 18 is a multiple and 9 is a factor. …………………………( )

2. The multiple of a number must be greater than the factor of this number. ………………………………( )

3. The greater the natural number, the more factors it has. ……………………………( )

4. As long as it is a multiple of 6, it must be a multiple of 3. ………………………………( )

5. odd plus odd equals odd. …………………………………… ( )

All the factors of 6 and 36 are 2, 3, 4, 6, 9, 12 and 18, with 7 * * *. ………… ( )

7. Numbers with 3, 6 and 9 in a unit can be divisible by 3. ………………………… ( )

8. Numbers A and B are multiples of 8, so the sum of a+b is also multiples of 8. …………( )

9. All even numbers are composite numbers. ………………………………………………( )

10, all odd numbers are prime numbers. ………………………………………………( )

Three, multiple-choice questions (65438+ 0 points per question, ***5 points)

1. Even if (), the result is odd.

A, multiply by 5 B, subtract 1 C, divide by 3 D and subtract 2.

2. The product of two consecutive natural numbers (excluding 0) must be ().

A, odd number b, even number c, prime number d, composite number

3, a basket of apples, two for one, three for one, four for one, five for one, all just finished eating, there is no surplus. This basket of apples should have at least ().

a， 120 b，90 c，60 d，30。

4. The number that is a multiple of 2, 3 and 5 at the same time is ().

a、 18 B、 120 C、75 D、830

5. A number x 3 = B number, and B number is A number ().

A, multiple b, factor c, natural number d, prime number

The second part solves the problem

Four, the operation problem (the second question every empty 3 points, the rest every empty 2 points, ***30 points)

1. Fill in the following figures as required.

3 6 12 13 15 19 24 3 1 42 83 160

The multiple of 3 is:.

The composite number is:.

The prime number is:.

2. Take out three of the following four digital cards and form three digits as required. (Write at least 3)

4 5 0 6

Can be composed of three digits: (),

Odd numbers have ()

Even numbers have ()

The multiple of 3 is ()

The multiple of 5 is ()

It is both a multiple of 3 and a multiple of 2 ().

3. Write the following prime numbers as required.

(1) Our total is 18. (2) Our product is 77.

(3) The gap between us is 17.

Five, solve the problem (5 points per question, ***20 points)

1, a natural number less than 30, is both a multiple of 8 and a multiple of 12. What's this number?

There are some children in the kindergarten. Teacher Wang took 32 sweets, which were distributed equally. It just ended. What is the possible number of children?

The child went to the stationery store and bought a diary. The unit price of the diary is not clear. He bought three diaries. Aunt Shop Assistant said that she should pay 134 yuan, but Xiaohong thought it was wrong. Can you explain why?

There are 36 tons of coal in the freight yard and three trucks with different loads. How can I be loaded by a truck with the least number of times?

1 car 2 car 3 car

2 tons, 3 tons and 5 tons

Sixth, challenges. (10)

There are 36 apples in 13 plates, and only one odd number can be put in each plate. Can you do it?