 
 <translate> Ken can do 20 sit-ups without stopping. Nathan can do twice as many, and Bob can do half the number of Ken and Nathan's combined sit-ups. How many more sit-ups can Bob do compared to Ken?
The answer is 10 <ibo> Ken nwere ike ime 20 sit-ups n'akwụsịghị akwụsị. Nathan na-eme nke ugboro abụọ, Bob na-emekwa nke ọkara nke nke Ken na Nathan jikọtara ọnụ. Ugboro ole ka Bob ga-eme ka Ken mee? Azịza ya bụ 10 