Determine the following:

Question

1.1.4 Write 780 as a product of its prime factors. (2)
1.1.5 Write down the prime numbers between 80 and 90

Answer 1

1.1.4 780 = 2 x 2 x 3 x 5 x 13

1.1.5 Prime numbers between 80 and 90: 83, 89