39
The Highest Common Factor (HCF) of 18 and 30 is the largest positive integer that divides both numbers without leaving a remainder. To find the HCF, we need to determine the common factors of 18 (1, 2, 3, 6, 9, 18) and 30 (1, 2, 3, 5, 6, 10, 15, 30) and identify the largest one they share, which is 6. Therefore, the HCF of 18 and 30 is 6.
1
156: Hcf of 13 and 39= 13 13*12=156 =156
HCF = 3... LCM = 18 !
The HCF of 39 and 20 is 1
The GCF is 3.
The GCF is 18.
The GCF is 9.
3
It is 13
It is 13