Jordan picked 54/3 = <<54/3=18>>18 ripe mangoes.

He picked 54 - 18 = <<54-18=36>>36 unripe mangoes.

Jordan gave 36 - 16 = <<36-16=20>>20 unripe mangoes to his sister.

Jordan's sister can make 20/4 = <<20/4=5>>5 jars of pickled mangoes.

# Answer

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<|im_start|>user
Jordan picked 54 mangoes from his tree. One-third of the mangoes were ripe while the other two-thirds were not yet ripe. Jordan kept 16 unripe mangoes and gave the remainder to his sister who pickled them in glass jars. If it takes 4 mangoes to fill a jar, how many jars of pickled mangoes can Jordan's sister make?
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5
Jordan picked 54 mangoes from his tree. One-third of the mangoes were ripe while the other two-thirds were not yet ripe. Jordan kept 16 unripe mangoes and gave the remainder to his sister who pickled them in glass jars. If it takes 4 mangoes to fill a jar, how many jars of pickled mangoes can Jordan's sister make?
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