# 1. Find the prime factors of the following numbers by division method:(ii) 1756(iii) 1165(iv) 105002

1. Find the prime factors of the following numbers by division method:
(ii) 1756
(iii) 1165
(iv) 10500
2.Write all the prime factors of the following numbers using factor tree:
(i)550
(ii) 1952
(iii)7952
3. Determine the HCF of numbers in each of the following by prime factorisation method:
(i)144, 192
(ii)225, 450
(iii)624, 936
(iv)513, 783
(v) 288, 1375
(vi)875, 1859
(vii)144, 180and192
(viii)84, 120, 138
(ix)106, 159, 265
(x)625, 3125, 15625
4. Determine the HCF of numbers in each of the following by continued division method:
(i)513, 783
(ii) 216, 1176
(iii) 1965, 2096
(iv)935, 1320
(v) 1624, 522, 1276
(vi) 2241, 8217,747
5. Which of the following pair of numbers are co-prime:
(i)15, 190
(ii) 1903, 130
(iii) 1505, 1030

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Factors of 18

Factors of 18 are integers that can be divided evenly into 18. There are overall 6 factors of 18 among which 18 is the biggest factor and its positive factors are 1, 2, 3, 6, 9 and 18. The Pair Factors of 18 are (1, 18), (2, 9) and (3, 6) and its Prime Factors are 1, 2, 3, 6, 9, 18.

Factors of 18: 1, 2, 3, 6, 9 and 18

Negative Factors of 18: -1, -2, -3, -6, -9 and -18

Prime Factors of 18: 2, 3

Prime Factorization of 18: 2 × 3 × 3 = 2 × 32

Sum of Factors of 18: 39

Let us explore more about factors of 18 and ways to find them.

What Are the Factors of 18?

Factors of a number are the numbers that divide the given number exactly without any remainder. According to the definition

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