Square and square roots puzzle

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Across
  1. 3. What is the square of 10
  2. 5. What method do we use for finding the square roots of bigger numbers.
  3. 6. What is 16 of 4
  4. 7. 5 is what of 25
Down
  1. 1. What is 4 (A perfect square or a perfect cube)
  2. 2. What is the squre root of 81 (write inn letters)
  3. 4. How many methods of finding out a square root are in class 8 DAV mathematics book