Question

Which is the greatest among $(81{)}^{18},(243{)}^{15},(27{)}^{21}$ and $(9{)}^{38}$ ?

• A. $(243{)}^{15}$
• B. $(27{)}^{21}$
• C. $(9{)}^{38}$
• D. $(81{)}^{18}$

Answer 1

Answer: (C)

Make all powers have equal bases