Question

When a number N is rounded to the nearest ten, the result is 630, but when

N is rounded to the nearest hundred, the result is 600. What is N?
Find a number N that rounds to 20,000 when rounded to the nearest ten
thousand. What is the greatest value of N? Least value?

Answer 1

• N = 625 to 634
• N = 15000 or 24999

Explanation:

Part 1

Let N = abc

• If ab = 62 then c could be any number between 5 to 9, it will round up to 630
• If ab = 63 then c could be any number between 0 and 4, it will round down to 630

Part 2

• N = 15000 ≈ 20000
• N = 24999 ≈ 20000