a) To find the sum of consecutive numbers from 1 to 2023, we can use the formula for the sum of an arithmetic series:

Sum = (n/2)(first term + last term)

In this case, the first term is 1 and the last term is 2023. The number of terms, n, can be found by subtracting the first term from the last term and adding 1:

n = last term - first term + 1 = 2023 - 1 + 1 = 2023

Plugging these values into the formula, we get:

Sum = (2023/2)(1 + 2023) = 1011(2024) = 2,046,264

Therefore, the sum of the numbers from 1 to 2023 is 2,046,264.

b) To find the sum of consecutive numbers from 2021 to 2029, we can again use the formula for the sum of an arithmetic series:

Sum = (n/2)(first term + last term)

In this case, the first term is 2021 and the last term is 2029. The number of terms, n, can be found by subtracting the first term from the last term and adding 1:

n = last term - first term + 1 = 2029 - 2021 + 1 = 9

Plugging these values into the formula, we get:

Sum = (9/2)(2021 + 2029) = 4.5(4048) = 18,216

Therefore, the sum of the numbers from 2021 to 2029 is 18,216.

c) To find the product of 30, 40, 50, and 60, we simply multiply them together:

Product = 30 x 40 x 50 x 60 = 72,000,000

Therefore, the product of 30, 40, 50, and 60 is 72,000,000.