How many fireworks does the organisation have altogether?

Question

Thornbury Round Table have an odd number of fireworks for their display, less than one thousand.
The sum of the digits in the number of fireworks is thirteen, the hundreds digit being twice the value of the ones digit.
How many fireworks does the organisation have altogether?

Answer 1

Possible no. 472,643,814
643 is the only odd no.
So Answer is 643