The grasshopper, the frog and the mouse had a jumping contest. The grasshopper jumped 30 inches. The grasshopper jumped 6 inches farther than the frog and the mouse jumped 7 inches lesser than the frog. How far did the mouse jump?
The grasshopper jumped 30 inches. 
The grasshopper jumped 6 inches farther than the frog. 
The mouse jumped 7 inches lesser than the frog. 

So, if the grasshopper jumped 6 inches farther than the frog, that means the frog jumped 24 inches. 

And if the mouse jumped 7 inches lesser than the frog, that means the mouse jumped 17 inches.