15. Write a group of 4 consecutive natural numbers, such that they are in ascending order, a multiple of 5, a multiple of 7, a multiple of 9, and a multiple of 11: $\qquad$
15. General Solution

For $3465 k+1735, 3465 k+1736, 3465 k+1737, 3465 k$ +1738 ( $k$ is a non-negative integer)