Awidget factory has four loading docks for storing crates of ready-to-ship widgets. any time a loading dock contains at least 5 crates, a truck picks up 5 crates from that dock and ships them away (e. g., if 6 crates are sent to a loading dock, the truck removes 5, leaving 1 leftover crate still in the dock).

whats the question?

step-by-step explanation:

168

step-by-step explanation:

i am pretty sure that the answer is 168

, and

for

step-by-step explanation:

we can analyze the pattern at which the terms increase. let us denote , , , so that we can call

note the following:

the pattern: to get the next term value, we just add the next term number (e.g. 1st, 2nd, to the previous term value (term values are the given numbers in the question, 1, 3, 6, 10, 15,

from , to get to , we add

from , to get to , we add

etc.

we need to form a recursive formula, a formula that has the next term as a function of the previous term. so a possible recursive formula can be

, and for