Question
PSLE
Riordan had 13 more one-dollar notes than fifty-dollar notes at first. He exchanged $250 worth of fifty-dollar notes for one-dollar notes. How many less fifty-dollar notes than one-dollar notes did Riordan have after the exchange?
2 m

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PSLE
Riordan had 13 more one-dollar notes than fifty-dollar notes at first. He exchanged $250 worth of fifty-dollar notes for one-dollar notes. How many less fifty-dollar notes than one-dollar notes did Riordan have after the exchange?