【Question 4】A natural number can be expressed as the sum of 5 consecutive natural numbers, and also as the sum of 7 consecutive natural numbers. Therefore, if we arrange the natural numbers that meet the above conditions in ascending order, the first 3 numbers are $\qquad$ -
Analysis: The Middle Term Theorem: For any arithmetic sequence with an odd number of terms, the value of the middle term is equal to the average of all terms, and also equal to half the sum of the first and last terms; or in other words, the sum of all terms is equal to the middle term multiplied by the number of terms.
According to the Middle Term Theorem,
a number that can be expressed as the sum of 5 consecutive natural numbers is divisible by 5, and a number that can be expressed as the sum of 7 consecutive natural numbers is divisible by 7. Therefore, the number sought is a common multiple of $5 \times 7=35$.
Arranged in ascending order, the first 3 numbers are $35$, $70$, and $105$.