What is the smallest odd number that cannot be expressed as a sum of two consecutive integers?

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Q1.

Which of the following numbers can be expressed as the sum of two consecutive numbers?

Q2.

Is it possible to express the number 10 as a sum of consecutive numbers in more than one way?

Q3.

Which of the following statements is true regarding even numbers and sums of consecutive numbers?

Q4.

If a number is written as a sum of four consecutive numbers, what can be concluded about its parity?