Looking for some tips on how to approach this problem:
Two mathematicians are surveying the damage done in a local park by a hurricane:
"It could have been worse," said one. "Less than 1/3 of the trees were lost."
His friend replied, "Yes, in fact, if you multiply by 10 the number formed by taking the last two digits of the number of trees that there used to be, and add to this the number formed by removing the last two digits of the number of trees there used to be, then you obtain the number of trees that there are now."
Not to be outdone, the first mathematician said, "And if you take the number of trees that were lost, and reverse the order of the last two digits, then you get the number of trees that there used to be plus the number of trees that there are now."
How many trees are now left in the park?