1. 25 - is an integer and would be a whole number.
2. −0.07 - is a negative number and would be a decimal.
3. 49 - is an integer and would be a whole number.
4. 99−−√ - is a square root and would be an irrational number.
5. −0.03521... - is a negative number and would be a decimal.
6. 121−−−√ - is a square root and would be an irrational number.