Question: Ernest bought 50 meters of wire and cut it into 5 equal parts. He then used 3 parts of the wire. How many meters of wire is not used?
Answer with step-by-step thinking: Each part of the wire is 50 / 5 = 10 meters long. Ernest used 3 parts, then he used 10 x 3 = 30 meters of the wire. Therefore, 50 - 30 = 20 meters of wire is not used.
So the answer is 20.


Question: Greg has his own dog walking business. He charges $20 per dog plus $1 per minute per dog for walking the dog. If he walks one dog for 10 minutes, two dogs for 7 minutes and three dogs for 9 minutes, how much money, in dollars, does he earn?
Answer with step-by-step thinking: Single dog is $20 + (10 minutes * $1 per minute) = $30. Two dogs are 2 * ($20 + (7 minutes * $1 per minute)) = $54. Three dogs are 3 * ($20 + (9 minutes * $1 per minute)) = $87. The total is $30 + $54 + $87 = $171.
So the answer is 171.


Question: Haley has 5 more necklaces than Jason. Josh has half the number of necklaces as Jason. If Haley has 25 necklaces, how many more necklaces does Haley have than Josh?
Answer with step-by-step thinking:
Jason has 25 - 5 = 20 necklaces. Josh has 20 / 2 = 10 necklaces. Haley has 25 - 10 = 15 more necklaces than Josh.
So the answer is 15.