The numbers 17.0145 and 21.0235 were rounded to three figures after...

According to the rules for rounding off numbers, if the digit to be dropped is $5$ and it is not followed by any non-zero digit, the preceding digit is left unchanged if it is even, and increased by $1$ if it is odd.

For $17.0145$, the digit to be dropped is $5$. The preceding digit is $4$, which is even. Therefore, it remains unchanged. The rounded number is $17.014$.

For $21.0235$, the digit to be dropped is $5$. The preceding digit is $3$, which is odd. Therefore, it is increased by $1$. The rounded number is $21.024$.

The resulting numbers are $17.014$ and $21.024$.