Basic Calculation: 05

Detailed Explanation: For the first set, the base of the number is 100
99 is 1 less than 100, so we take 99-1, i. e. 98 hundred + 1² = 98,01
98 is 2 less than 100, so we take 98-2, i. e. 96 hundred + 2² = 96,04
97 is 3 less than 100, so we take 97-3, i. e. 94 hundred + 3² = 94,09
96 is 4 less than 100, so we take 96-4, i. e. 92 hundred + 4² = 92,16

For the Second set, the base of the number is 1000
999 is 1 less than 1000, so we take 999-1, i. e. 998 thousand + 1² = 998,001
998 is 2 less than 1000, so we take 998-2, i. e. 996 thousand + 2² = 996,004
997 is 3 less than 1000, so we take 997-3, i. e. 994 thousand + 3² = 994,009
996 is 4 less than 1000, so we take 996-4, i. e. 992 thousand + 4² = 992,016