Question

Complete the given factor tree and apply the method of prime factorisation to represent all the prime factors of 990.​

Answer 1

• We have given one factor of 990, that is 2. So, for the second factor we have to divide 990 by 2. ​

• Therefore, ​

990 ÷ 2 = 495​

• Now move on to the next branch.​

495 ÷5 =99​

• Now move on to the next branch. ​

99 ÷11 =9​

• Now, 9 will be divided into two prime numbers.​

9 = 3 × 3; ​

where 3 is prime number​

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