Source: The Math League
http://www.mathleague.com
2A: WYOMING x 8 = ILLINOIS
7920658 x 8 = 63365264
2B: FLORIDA x 5 = OKLAHOMA 8741290
x 5 = 43706450
Source: Journal of Recreational Mathematics, vol. 29, num. 2, p. 126
2C: AB x C = DE and FG - DE = HI (don't use 0 in the solution)
Source: 536 Curions Problems & Puzzles, by Henry Ernest Dudeney,
p. 47 (#152)
Don Braffitt