At a lunar research base, Emek and Tara tried to combine measurements from two exploration rovers. One rover had classified each value into only one number set, causing conflicts in the database. It labeled sqrt(49) only as irrational because it contained a square root symbol. Tara simplified it to 7 and explained that 7 is natural, integer, rational, and real. Another measurement, -4, was labeled only as an integer. Emek pointed out that -4 can also be written as -4/1, so it is rational and real. They checked 0.625 and rewrote it as 5/8, confirming that it was rational, while sqrt(10) remained irrational because 10 is not a perfect square. Emek and Tara used the nesting of the number sets to correct every entry instead of choosing overly narrow categories. Once the classifications matched, the rover records combined successfully into one reliable database for future lunar missions.