Composite Numbers

Q.

The largest four digit composite number is:-

1. 1000

2. 999

3. 989

4. 949

Q.

24 is a perfect number.

1. whose sum of all its factors is equal to twice the number.

2. 27

Q. The composite numbers between 30 and 40 are

1. 32, 33, 34, 35, 36, 38, 39
2. 34, 35, 36, 38, 39, 42, 44
3. 31, 34, 35, 36, 37, 38, 39,
4. 28, 32, 33, 34, 35, 36, 38,

Q.

Write all composite numbers between $1$ to $70$ ?

Q. Which are the even prime numbers ?

Q.

What is the product of the smallest two-digit composite odd number and the biggest even prime number?

Q.

H.C.F of one and any number is ___ .

Q.

Which of the following is a perfect number?

1. 4

2. 10

3. 9

4. 6

Q. Is 93 a prime or composite number?

1. Prime number
2. Composite number
3. Cannot be determined

Q.

The prime factorization of a number is given as 3×3×11×101. Which of the following is correct about the number ?

1. It is an odd number.

2. It is the highest 4 digit number.

3. None of the above

4. Both A & B

Q.

Write all the composite numbers between $1$ and $31$.

Q. A composite number always has more than two distinct factors.

1. True
2. False

Q. Pop the composite numbers.

1. 2
2. 6
3. 7
4. 9
5. 12
6. 18
7. 23
8. 30
9. 1
10. 37

Q. Choose the correct statement about composite numbers.

1. All the even numbers are composite in nature.
2. All Odd numbers are composite numbers.
3. Every composite number has a prime factor.
4. All of the above.

Q. Length of a board is $12$ feet and width is $11$ feet. How many boards of same area can be manufactured given that length and breadth of the board should have integer values and length is less than breadth..

1. $5$
2. $6$
3. $7$
4. $8$

Q.

$1$ is neither _______ nor ________

Q. I am an Odd composite number.
I am a common factor of $27$ and $45$.
I am less than $11$.
What number am I?

1. $15$
2. $9$
3. $3$
4. $5$

Q.

Three pieces of a ribbon were cut from a ribbon of length 81/5 m. The length of the 1st piece was 4/5 4/5 , 2nd piece was 3/2 m, and the 3rd piece was 3 times as long as the 1st and 2nd pieces put together.

a). What length of ribbon was cut off in total ?

b). What length of ribbon was left ?

Q. What are composite number

Q. Choose the factor pair of 210 which has only composite numbers.

1. $14\times 15$
2. $3\times 70$
3. $2\times 105$
4. $7\times 30$

Q. The sum of all the prime factors of $196$ is prime or composite?

1. Prime
2. Composite

Q. Renu bought two pieces of ribbon measuring 8*1/6m and 7*2/3m. She used 12*1/3m of it on her doll.How much ribbon is left with her?

Q. The real factors of $x^4+4$ are __________.

1. $(x^2+2)(x^2+2)$
2. $(x^2+2)(x^2-2)$
3. $(x^2-2x+2)(x^2+2x+2)$
4. Does not exist