Ten more than twice the number of birds on the fence is 50. How many birds are on the fence?
Let's think: Let x be the number of birds on the fence. We know that 10 + 2 * x = 50. Subtracting 10 from both sides, we get 2 * x = 50 - 10 = 40. Dividing both sides by 2, we get x = 20.. The answer is: 20.

Dina has 60 dolls. She has twice as many dolls as Ivy. 2/3 of Ivy's dolls are collectors editions. How many collectors edition dolls does Ivy have?
Let's think: Ivy has 60 / 2 = 30 dolls. Ivy has 30 / 3 * 2 = 20 collectors edition dolls.. The answer is: 20.

There are 25 roses in a garden. There are 40 tulips. There are 35 daisies. What percentage of flowers are not roses?
Let's think: There are 25 + 40 + 35 = 100 flowers total. There are 40 + 35 = 75 flowers that are not roses. Therefore, (75 / 100) * 100 = 75% of the flowers are not roses.. The answer is: 75.

Mr. Caiden wants to do repairs to his house and requires 300 feet of metal roofing to do this. If each foot of roofing costs $8, and the supplier of the metal roofing brings in 250 feet of metal roofing for free, how much money is Mr. Caiden required to pay for the remaining metal roofing?
Let's think:
The supplier brought 300 ft - 250 ft = 50 fewer feet of metal roofing. Therefore the total amount of money Mr. Caiden has to pay for the remaining metal roofings is 50 feet * $8 / foot = $400.. The answer is: 400.