Numbers in Korean: A Matching Puzzle

You can see Korean numbers in the picture below. Match them up with the English numbers that can be found immediately beneath the image. But be cautious! One of the English numbers doesn't have its Korean counterpart. Which one?

MATCHING EXERCISE

one

two

three

four

five

six

seven

eight

nine

ten

eleven

twelve

thirteen

fourteen

fifteen

sixteen

seventeen

eighteen

nineteen

twenty

thirty

forty

fifty

sixty

seventy

eighty

ninety

Please, let me know if you need the solution :-D