The radical sign $\sqrt{}$ refers to the “square root function” i.e. $\sqrt{x}=x^{\frac{1}{2}}$. You should remember:

Consider this GRE Quant practice question of the day:

## Question of the Day

 Quantity A Quantity B $\sqrt{y^{24}}$ $y^3 \times y^4 \times y^5$