Mercury, Venus, Earth,
Mars (Planets from the Sun)
1, 18, 4,
13 (Numbers on a Dart Board)
USA, China, Canada,
Russia (Countries by Size)
Seoul, Barcelona, Atlanta,
Sydney (Olympic Venues)
May, June, March,
August (months in order of letters in their names)
Vietnam, Yemen, Zambia,
Zimbabwe (countries in alphabetical order)
Mandarin, Spanish, English,
Hindi (most spoken languages in the world by native speakers)
January, February, March,
April (months in English)
Italy, Spain, Germany,
France (World Cup Winners)
A, S, D,
F (middle row of the keyboard!)
Val Kilmer, George Clooney, Christian Bale,
Robert Pattinson (actors to play Batman)
I, V, X,
L (Roman Numerals)
Ottawa, Washington D.C, Havana,
Mexico City (North American Capital cities going down)
Red, Orange, Yellow,
Green (The colours of the rainbow)
Alpha, Bravo, Charlie,
Delta (phonetic alphabet)
Tiger, Rabbit, Dragon,
Snake (Chinese New Year animals in order)
Philosopher's Stone, Chamber of Secret, Prisoner of Azkaban,
Goblet of Fire (Harry Potter books)
1, 4, 9,
16 (Squares of 1, 2, 3 4)
Winter, Spring, Summer,
Autumn (seasons)
Australian Open, French Open, Wimbledon,
US Open (order of Grand Slams)