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Finding Square of a Number with Unit's Place 5

Which of the ...

Question

Which of the following can be represented as sum of the squares of 15 consecutive odd natural numbers
1. 76851
2. 84329
3. 65183
4. None of these.

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Solution

DEAR STUDENT,

None of these
Because, Unit digit of sum of squares of any 15 consecutive odd numbers is 5.

REGARDS.

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Finding Square of a Number with Unit's Place 5

Standard VII Mathematics

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