First such a number is 208. <<<---=== To find it, first divide= 15.4; then multiply 13*16 = 208. Last such a number is 494. <<<---=== To find it, first divide = 38.46; then multiply 13*38 = 494. Between 104 and 494, there are = 22 intervals of the equal length of 13 units in the number line. Hence, the number under the question is 22+1 = 23. Answer. 23 numbers.
Starts at 208 and ends at 494.
Number of MULTIPLES: