BEAT the BOMB  V 1.05  Addition Drill Program 
Race against a clock, a bomb, or a snail or 
build castles with correct answers. Many 
options: change number of problems, missing 
factors, etc. Sound, clock, and animation can 
be turned on or off. Setups and scores saved. 
Fast animated color graphics. Free. Enhanced 
version ($15 + $3 S&H) includes subt., mult.,
div., combined mode, more animation. Needs 
mouse, 512k, DOS 2.1 min., color EGA/VGA.