 This article is about the challenge scrolls found in treasure trails. For the rare scrolls dropped by various monsters, see Champion scroll.
Challenge scrolls
Challenge scrolls are logical problems posed to the player by an NPC. They appear in Medium and Hard clues in Treasure Trails and have two steps to it: first the player has to find the right NPC to speak to (when they get a cryptic or anagram clue), and then they have to solve the riddle, to advance along their trail. Thus, challenge scrolls don't count as a regular clue. To complete the scroll, view the question on the scroll, then speak to the NPC which gave it to provide the answer. When the correct answer is provided the challenge is complete, and the player will receive either the next clue, or the reward. It is also possible able to obtain more than one challenge scroll by asking the NPC players got it from with a full inventory. Every time players talk to the NPC, another appears on the ground that they can pick up. However, if they already have one in their inventory or bank, they cannot pick another one up.
List of solutions
The following is a list of all known challenge scrolls and their solutions. The riddles are usually fairly simple, but sometimes call on trivial facts such as 'How many animals are in the Ardougne Zoo?' This list will allow players to bypass counting animals.
Asked by  Question  Answer 

Zoo keeper  How many animals are in the Ardougne Zoo?  40, +1 if Eagles' Peak is completed, +1 if Hunt for Red Raktuber is completed 
Luthas and Cap'n Izzy NoBeard's parrot  How many banana trees are there in the plantation?  33 
King Roald  How many bookcases are there in the Varrock palace library?  24 
Gabooty  How many buildings in the village?  11 
Cook  How many cannons does Lumbridge castle have?  7 
Caroline  How many fishermen on the fishing platform?  11, 0 after Salt in the Wound 
Bolkoy  How many flowers are in the clearing below this platform?  13 
Gnome Coach  How many gnomes on the gnome ball field have red patches on their uniforms?  6 
Recruiter  How many houses have a cross on the door?  20 
Brundt  How many people are waiting for the next bard to perform?  4 
Edmond  How many pigeon cages are there around the back of Jerico's house?  3 
Oracle  If x is 15 and y is 3, what is 3x + y?  48 
Karim  I have 16 kebabs, I eat one myself and share the rest equally between 3 friends. How many do they have each?  5 
Hazelmere / Brimstail  What is 19 to the power of 3?  6859 
Gnome ball referee  What is 57x89+23?  5096 
Valerio  How many windows in the Abbey courtyard?  17 
Moldark, Emissary of Zamorak  How many bottles are there on the stall to the east of Mr Ex? 
7 
Ysondria  How many ore rocks are there in the nearby copper and tin mine?  10 
Nails Newton  How many tables are there in the Pick and Lute Inn?  10 
Rommik  How many rocks in the Rimmington mine cannot be used to make bronze?  11, 7 after the Mining/Smithing Rework update 
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