AP State Syllabus AP Board 6th Class Maths Solutions Chapter 3 HCF and LCM Ex 3.4 Textbook Questions and Answers.

## AP State Syllabus 6th Class Maths Solutions 3rd Lesson HCF and LCM Ex 3.4

Question 1.

Prepare a factor tree for 90.

Answer:

Prime factorization of 90 is 2 × 3 × 3 × 5 = 90

Question 2.

Factorise 84 by division method.

Answer:

Prime factorization of 84 is 2 × 2 × 3 × 7 = 84

Question 3.

Write the greatest 4 digit number and express it in the form of its prime factors.

Answer:

The greatest 4 – digit number is 9999.

Prime factorization of 9999 is 3 × 3 × 11 × 101 = 9999

Question 4.

Write the prime factorization of 96 by factor tree method.

Answer:

Prime factorization of 96 is 2 × 2 × 3 × 2 × 2 × 2 = 96

Question 5.

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

Answer:

The first four primes are 2, 3, 5, 7.

Their product = 2 × 3 × 5 × 7 = 210

So, the smallest number, having four different prime factors is 210.

Question 6.

Write the prime factorization of 28 and 36 through division method. Write the prime factorization of 42 by factor tree method.

Answer:

Prime factorization of 28 is 2 × 2 × 7 = 28

Prime factorization of 36 is 2 × 2 × 3 × 3 = 36

Prime factorization of 42 is 2 × 3 × 7 = 42