A sequence is formed by adding 2 to the triple of the previous term. If the first term is 1, how many multiples of 5 less than 10,000 would be terms of the sequence?
The sequence is as folllows:
1, 5, 17, 53, 161, 485, 1457, 4373 - that is it.
Just 2 multiples of 5 < 10,000, and that is: 5 and 485.
