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What is the sum of $1+2+3+...+30$?
What is the sum of $1+2+3+...+30$?
What is the average of $1, 2, 3, ..., 30$?
What is the average of $1, 2, 3, ..., 30$?
What is the 15th term in the sequence $1, 2, 3, ...$?
What is the 15th term in the sequence $1, 2, 3, ...$?
What is the value of 1² + 2² + 3² +...... + 12²?
What is the value of 1² + 2² + 3² +...... + 12²?
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What is the sum of the squares of the first 12 natural numbers?
What is the sum of the squares of the first 12 natural numbers?
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Calculate 1² + 2² + 3² +...... + 12².
Calculate 1² + 2² + 3² +...... + 12².
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