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Between 18^2 and 19^2 how many natural n...

Between `18^2` and `19^2` how many natural numbers are there?

A

38

B

36

C

42

D

40

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R G PUBLICATION-REVISION-EXERCISE
  1. Which of the following is a square of an odd natural number?

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  2. Which of the following will have 1 (one) in the unit place?

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  3. Between 18^2 and 19^2 how many natural numbers are there?

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  4. Which of the following is not a perfect square?

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  5. If sqrt2025=45 then sqrt20.25 is equal to

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  6. Which of the following is not a perfect cube? 3757

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  7. Which of the following are perfect cubes? 3375

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  8. Which of the following is not a perfect cube? 3332

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  9. Which of the following is not a perfect cube? 4096

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  10. Find the cubes of the following numbers. 19

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  11. Find the cubes of the following numbers. 21

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  12. Find the cubes of the following numbers. 23

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  13. Find the cubes of the following numbers. 27

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  14. Write the digit in the unit place of the cubes of the following number...

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  15. Write the digit in the unit place of the cubes of the following number...

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  16. Write the digit in the unit place of the cubes of the following number...

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  17. Write the digit in the unit place of the cubes of the following number...

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  18. Find the smallest integers with which the following numbers are to be ...

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  19. Find the smallest integers with which the following numbers are to be ...

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  20. Find the smallest integers with which the following numbers are to be ...

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