Answer:
680 oranges
15 levels
Step-by-step explanation:
Add 2, add 3, add 4, add 5.....
1+3+6+10+15+21+28+36+45+55+66+78+91+105+120=680
He can’t add a 16th level, because it would have 136 oranges, which would put him over 800.
15 levels, 680 oranges.
Guess an check. The first 15 add to 680. The 16th is 136. 680+136=810, which is over 800.
