Question

How many natural numbers lies between 81 square and 82 square

Answer 1

When we count numbers, we can think of inequality.

81²<N<82²

If numbers start from somewhere and ends elsewhere, total value is :

Greatest - Smallest + 1

But in this case, they are between, two gets ignored :

Greatest - Smallest - 1

Luckilly, we can use identity on 82² - 81² - 1

→ (82 + 81) × (82 - 81) - 1

→ 163 - 1 → 162

There are total 162 numbers between them.

In my opinion, this answer was not that smart. But I hope you understood.

Math is not memorizing, it is to understand. - Me-

Answer 2

Answer:

162 is the answer

Step-by-step explanation:

I hope it will help u