rubber-duck-mcp/apps/eval/data/tasks.json

[
  {
    "id": "t1",
    "question": "There were 3 apples on the table. You took 2 apples. How many apples are left on the table?",
    "answer": "1"
  },
  {
    "id": "t2",
    "question": "A farmer has 17 chickens. All but 9 of them died. How many chickens are still alive?",
    "answer": "9"
  },
  {
    "id": "t3",
    "question": "How many months of the year have 28 days?",
    "answer": "12"
  },
  {
    "id": "t4",
    "question": "A pencil and a pen together cost $1.10. The pen costs $1 more than the pencil. How much does the pencil cost?",
    "answer": "5 cents"
  },
  {
    "id": "t5",
    "question": "If 5 machines make 5 widgets in 5 minutes, how many widgets will 100 machines make in 100 minutes?",
    "answer": "2000"
  },
  {
    "id": "t6",
    "question": "Water lilies grow in a lake. Their number doubles every day. The pond is completely covered in 48 days. In how many days is half of the pond covered?",
    "answer": "47"
  },
  {
    "id": "t7",
    "question": "Of the numbers from 1 to 9 inclusive, how many contain the letter \"e\" in their English name?",
    "answer": "6"
  },
  {
    "id": "t8",
    "question": "You have a list of 12 numbers. If you remove every second number from the list, how many numbers remain?",
    "answer": "6"
  },
  {
    "id": "t9",
    "question": "A coin is tossed 3 times. What is the probability that heads comes up all 3 times?",
    "answer": "1/8"
  },
  {
    "id": "t10",
    "question": "I have $10. I spent $3.50 on bread and $1.50 on milk. How much change is left?",
    "answer": "$5"
  },
  {
    "id": "t11",
    "question": "A train 100 meters long travels at 36 km/h. How many seconds does it take for the train to fully pass a pole?",
    "answer": "10"
  },
  {
    "id": "t12",
    "question": "A number is increased by 30% and the result is 78. What was the original number?",
    "answer": "60"
  },
  {
    "id": "t13",
    "question": "A room has 4 corners. In each corner sits a cat. Opposite each cat sit 3 cats. How many cats are in the room in total?",
    "answer": "4"
  },
  {
    "id": "t14",
    "question": "The perimeter of a square is 28 cm. What is its area?",
    "answer": "49"
  },
  {
    "id": "t15",
    "question": "Lena is twice as old as Misha. The sum of their ages is 36. How old is Misha?",
    "answer": "12"
  },
  {
    "id": "t16",
    "question": "In a drawer there are 10 white and 10 black socks mixed together. How many socks must you take out blindfolded to be guaranteed a matching pair of one color?",
    "answer": "3"
  },
  {
    "id": "t17",
    "question": "If 3 hens lay 3 eggs in 3 days, how many eggs will 6 hens lay in 6 days?",
    "answer": "12"
  },
  {
    "id": "t18",
    "question": "Eight minus four divided by two (8 - 4/2). What is the value of the expression?",
    "answer": "6"
  },
  {
    "id": "t19",
    "question": "There are 7 candles on a table. 3 of them go out. How many candles are left on the table?",
    "answer": "7"
  },
  {
    "id": "t20",
    "question": "Vitya has 5 toy cars, Katya has 3 times more. Then Katya gave Vitya as many cars as he had originally. How many cars does Katya have now?",
    "answer": "10"
  },
  {
    "id": "t21",
    "question": "The sum of three consecutive odd numbers is 27. What is the largest of them?",
    "answer": "11"
  },
  {
    "id": "t22",
    "question": "There were 12 birds sitting on a tree. A hunter shot and brought down 3. How many birds are still sitting on the tree?",
    "answer": "0"
  },
  {
    "id": "t23",
    "question": "A brick weighs 1 kilogram plus half of its own weight. How much does the brick weigh?",
    "answer": "2"
  },
  {
    "id": "t24",
    "question": "A father is 3 times as old as his son. Together they are 40 years old. In how many years will the father be exactly twice as old as the son?",
    "answer": "10"
  },
  {
    "id": "t25",
    "question": "What positive number, when multiplied by itself, gives 144?",
    "answer": "12"
  },
  {
    "id": "t26",
    "question": "I have two $1 coins and five 50-cent coins in my pocket. How much money do I have in total?",
    "answer": "$4.50"
  },
  {
    "id": "t27",
    "question": "Three brothers each have one sister. How many children are in the family in total?",
    "answer": "4"
  },
  {
    "id": "t28",
    "question": "Two fathers and two sons went fishing, but there were only 3 people, and each had their own fishing rod. How is that possible?",
    "answer": "They are grandfather, father and son - three generations"
  },
  {
    "id": "t29",
    "question": "Which is heavier: a kilogram of iron or a kilogram of cotton wool? Explain.",
    "answer": "They weigh the same - one kilogram each"
  },
  {
    "id": "t30",
    "question": "A shirt cost $40. It was discounted by 20%, and then by another 10% off the new price. How much does the shirt cost now?",
    "answer": "$28.80"
  },
  {
    "id": "t31",
    "question": "Sasha is older than Misha but younger than Petya. Who is the youngest?",
    "answer": "Misha"
  },
  {
    "id": "t32",
    "question": "Explain why the number 0 is considered even.",
    "answer": "0 is divisible by 2 without a remainder, so it is even"
  },
  {
    "id": "t33",
    "question": "A chocolate bar is divided into 8 equal parts and 3 parts are eaten. What percentage of the bar is left?",
    "answer": "62.5%"
  }
]