The HCF of 1020, 850 and 1156 is:Choices:- 28 24 34 22

To find the Highest Common Factor (HCF) of 1020, 850, and 1156, follow these steps:

1. First, find the prime factors of each number.
2. Then, identify the common prime factors.
3. Finally, multiply these common prime factors to get the HCF.

Let's do this step by step:

1. Prime factors:

   • 1020 = 2 x 2 x 3 x 5 x 17
   • 850 = 2 x 5 x 5 x 17
   • 1156 = 2 x 2 x 17 x 17

2. The common prime factors are 2 and 17.

3. Multiply these common prime factors: 2 x 17 = 34

So, the HCF of 1020, 850, and 1156 is 34.