1. How many knuts were saved when Rubeus Hagrid purchased 5,190 knuts worth of gillyweed at Quality Quiddich Supplies with 10,758 knuts?

Answer: 5,568 knuts were saved.

1. If Madam Malkin purchased 15,731 knuts worth of supplies for Hogwarts uniforms but was only given 8,543 knuts, how much is the difference?

Answer: 7,188 knuts.

1. How much would it cost to purchase a set of robes with a wand from Ollivanders if it cost 15,940 knuts but Tom only had 10,326 knuts?

Answer: 5,614 knuts.

1. How much is the difference in the amount of sickles invested by Hermione Granger and Sirius Black when Hermione invested 13,235 sickles, whereas Sirius invested 9,501 sickles?

Answer: 3,734 sickles.

1. How many knuts would it cost to purchase a Nimbus 2000 broomstick and a vault at Gringotts Bank when it cost 12,790 and 15,840 knuts?

Answer: 2,850 knuts.

1. Professor Snape purchased 5,166 knuts worth of ingredients from Flourish and Blotts, but only had 10,477 knuts, what is the difference?

Answer: 5,311 knuts.

1. What is the difference between the amount of Galleons used by Professor Dumbledore and Lord Voldemort when Dumbledore bought 10,038 Galleons, yet Lord Voldemort only purchased 5,947 Galleons?

Answer: 4,091 Galleons.

1. How much does Harry Potter owe Dobby when he purchased a Remembrall and a Sock Set for 15,484 knuts with only 9,505 knuts?

Answer: 5,979 knuts.

1. If a restricted section book at Flourish and Blotts costs 14,677 knuts and Remus Lupin only has 8,308 knuts how much is the difference?

Answer: 6,369 knuts.

1. How many Galleons were saved if Filch purchased a cleaning cauldron with 8,763 Galleons but only had 13,553?

Answer: 4,790 Galleons