Prime Factorisation by Division Method

Q.

I am the smallest number having four different prime factors. Can you find me?

Q. What are the methods to find Prime factorization?

Q.

Question 10 (a)

Express the given number as the sum of three odd primes:
21

Q.

What are vampire numbers?

Q.

The maximum capacity of a container that can measure $60$ litre and $75$ litre exactly is:

1. $15$ litres

2. $30$ litres

3. $20$ litres

4. $25$ litres

Q. When a group of 14 cups is divided into sets of 3, find the dividend.

1. 14
2. 4
3. 3
4. 2

Q. Prime factorization of 18 is .

1. $1\times 1$
2. $1\times 17$
3. $7\times 3$
4. $2\times 17$

Q. What are vampire number ?

Q.

Three vessels of orange juice contain 9, 27 and 15 litres of juice respectively. Find the measure of a glass of maximum capacity that can exactly measure the juice in three of the vessels?

1. 3

2. 7

3. 9

4. 4

Q.

The prime factorization of the highest 4 digit odd number is 3 x 3 x 11 x 101.

1. It is an odd number.

2. It is the highest 4 digit number.

Q. express 3825 as a product of its prime number

Q.

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

1. It is an even number.

2. It is the smallest 4 digit odd number.

3. The number is 10000.

4. It is the greatest 4 digit number.

Q.

Prime factorize 17.

1. 1 x 1
2. 1 x 17
3. 7 x 3
4. Cannot be done

Q. Select the correct prime factorization of
(i) 62
(ii) 32

1. 1024

2. 1034

3. 512

4. 1032

Q.

In the viedo there are two methods one is factor tree what is the other method name

Q. How many odd factors does 56 have?

1. 3
2. 4
3. 2
4. 1

Q. What is a vanpire number ?

Q.

why the name of the prime factorization is prime factorization?

Q.

What do you mean by prime factorization?

1. Writing a number as a product of any other numbers.

2. Writing a number as a product of only prime factors.

3. Writing a number as a sum of only prime factors.

4. Writing a number as a sum of any other numbers.

Q.

How to do prime factorisation of 9999 by tree method

Q.

Which of the following numbers is a perfect number:

1. 12

2. 6

3. 8

4. 10

Q.

Choose the correct option.

1. 72 = 2 × 2 × 2 × 3 × 3 × 3

2. 105 = 3 × 5 × 7

3. 625 = 5 × 5 × 5 × 5 × 5

4. 162 = 2 × 3 × 3 × 3 × 3 × 7

Q.

Michelle gave Simon a simpler question to solve, and asked her factorize the number 84. Simon gave the correct answer this time. Guess her answer.

1. 2 × 2 × 3 × 7
2. 2 × 2 × 3 × 5
3. 2 × 2 × 2 × 3
4. 2 × 2 × 7

Q.

Michelle asked Simon to take the largest 4 digit odd number, where each digit is unique and factorize it. Simon got an incorrect solution, so Michelle gave the correct solution. Which among the following can be Michelle's answer?

1. 5 × 5 × 79 × 79
2. 5 × 5 × 79
3. 5 × 5 × 5 × 79
4. 79 × 2 × 5 × 5

Q.

What is the maximum length of equal pieces of cardboard that Nirmala can get, if she breaks two bars of cardboard 84 cm and 156 cm long?

1. 15 cm

2. 14 cm

3. 12 cm

4. 16 cm