Q - 3 Do as directed. 1. Find the square root of 16. 2. 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 (_)? 3. Find square root : 7,225 4. Find cube root of 21,952 by prime factorization method. 5. How many perfect squares are there from 1 to 80? 6. 9,000 is a perfect square number. Is this statement true or false?
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1+3+5+7+9+11+13+15 (_)
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1. Find the square root of 16.
The square root of 16 is 4
2. 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 (_)^2
Addition of 1 + 3 + 5 + 7 + 9 + 11 + 13 + 15 is 64.
64 is 8^2
3. Find square root : 7,225
The square root of 7225 is 85
4. Find cube root of 21,952 by prime factorization method.
prime factors of 21952 = 2x2x2x2x2x2x7x7x7
=> make three groups of same numbers
=> (2x2x2) x (2x2x2) x (7x7x7)
=> 2 x 2 x 7
=> 28
hence, 28^3 is 21952
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