AlgebraDifficulty 1.0JuniorFind the answerUnited Kingdom
How many seconds are there in 41 of 61 of 81 of a day?
(A) 60 (B) 120 (C) 450 (D) 900 (E) 3600
Want a route through all this instead of an archive? The track
puts 2,604 problems in a working order, from Junior Challenge level to the IMO shortlist.