The New year gift

The new year gift
The student council's member were getting prepared for the new year.They were prorating the candies and biscuits in paper bags;but when they got to divide the tangerines,they confronted a funny problem!First they put 10 tangerins in each envelope & they saw 9 tangerins remained for the last one;then they decided to put 9 in each envelopes & they saw it remained 8 for the last one.They put 8 tangerines in each envelope,it remained 7 for the last paper bag...It was a strange state & it continued until they put 2 tangerines in each paper bag but again it remained one tangerine for the last one.

Can you explain the problem and find the total numbers of the tangerines?

I'll get the answer in the next post.

Today's Quote:
"Obey the God in the deal that you need Him & sin Him the measure that you can stand His torment & strive in the deal that you will live in this world & take the baggage of goodies as much as you will pause in that world."
~person.number2~