Question

1. How many natural numbers lie between 9² and 10² ?​

Answer 1

Answer:

9^2= 81

10^2= 100

Step-by-step explanation:

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Answer 2

Answer:

19

Step-by-step explanation:

All you have to do is

10^2 - 9^2

Using a2-b2= (a+b)(a-b)

=(10+9)(10-9)

=19(1)

=19