Where does brilliant get its problems from?

Most of the problems are created by the Brilliant Challenge Masters and their team.

Recently, there have been some students that submitted original problems which they came up with. These problems, if used, will come along with the statement "This problem has been proposed by X", and provide a link to the profile. You are welcome to submit problems (with well written solutions) to Mathematics@brilliant.org. – Calvin Lin Staff · 4 years, 4 months ago

I think they create some of them and others are the modified forms of questions of competetive olympiads,they use the same but with different values and making it something tricky they are good at transforming question! – Alpha Beta · 4 years, 4 months ago

At least some of them are written by their staff. They also say in their FAQ that you can submit problems for consideration, and if selected to appear in a Pset, would be given credit. – Maddy B · 4 years, 4 months ago

I think they have problem makers staffed. – Brock West · 4 years, 4 months ago

i need this answer too – Ãħmëđ El Ḇana · 4 years, 4 months ago

Can anyone tell me a good source of questions like Brilliant provide,except AOPS,is there any other site which give good non-routine questions....?Calvin might be knowing? – Kiran Patel · 4 years, 4 months ago

Many of the questions ask for the answer in the form that they would on the AIME. – Michael Tang · 4 years, 4 months ago

can any one plzz tell me a book in which there are questions of olympiad level (aong with the solutions )............... – Ayushman Gupta · 4 years, 4 months ago

Both of them, I think. Maybe, they just pick a little problems from google, and then they edit them. – Ivan Pito Pradhana · 4 years, 4 months ago