It's well-known that men from Nepal are vigorously physically tested before becoming Gurkhas, some of the finest and most feared soldiers in the world.
Candidates have to take on a fearsome uphill test of stamina, the 'Doko Race', carrying a rattan basket filled with sand, suspended by a woven strap around their forehead.
The load weighs 25kg, with much of the weight directed on the neck, and has to be completed in 48 minutes.
But did you know that to join the British Army, hopeful Gurkha recruits also have to pass extremely tough English and maths tests and excel during interviews?
How are your maths skills? Want to see if you could pass one of the tests they have to? Have a go below...