We have a question: A roll of 25 m wire weighs 5 kg. How much does a 75 m roll weigh?
And an answer: 15
So how you got the answer?
We know that the 75 m roll is three times bigger than the 25 m roll because 75 m / 25 m = 3. This means the 75 m roll weighs 3 times more than the 25 m roll: 5 kg * 3 = 15 Kg.

We have a question: In 5 years, Joey will be as old as Beth is now. If Joey is 9 now, how old was Joey when Beth was Joey's age now?
And an answer: 4
So how you got the answer?
Beth is 5 + 9 = 14 now. Beth was 9 years old 14 - 9 = 5 years ago. Joey was 9 - 5 = 4.

We have a question: Bucky earns money each weekend catching and selling fish. He wants to save up for a new video game, which costs $60. Last weekend he earned $35. He can earn $5 from trout and $4 from blue-gill. He caught five fish this Sunday. If 60% were trout, and the rest were blue-gill, how much more does he need to save before he can buy the game?
And an answer: 2
So how you got the answer?
He is $25 short for the game because 60 - 35 = 25. He caught 3 trout because 5 x .6 = 3. He caught 2 blue - gill because 5 - 3 = 2. He earned $15 from the trout because 3 x 5 = 15. He earned $8 from the blue - gill because 2 x 4 = 8. He earned $23 total because 15 + 8 = 23. He is $2 short because 25 - 23 = 2.