How many natural numbers are there between $ 11^2 $ and $ 12^2 $ ?

How many natural numbers are there between $ 11^2 $ and $ 12^2 $ ?
$ 11^2 $ और $ 12^2 $ बीच कितनी प्राकृतिक संख्याएँ हैं?

20 21 22 23

Detailed Solution & Logic

Correct Answer:

We need to find the count of natural numbers strictly between $11^2$ and $12^2$.
- $11^2=121$
- $12^2=144$
So, the natural numbers between them are:
122,123,124,...... ,143.
This is an arithmetic sequence starting at 122 and ending at 143.
Count=(143-122)+1=22
✅ Answer: 22 natural numbers

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