{
  "name": "Rational and Irrational numbers",
  "order": 21,
  "challenges": [
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      "title": "Rational Numbers",
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      "challengeSeed": [
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    {
      "id": "59a5801209a6acac59836421",
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    {
      "id": "59a5801209a6acac59836422",
      "title": "Subtract Rational Numbers",
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      "challengeSeed": [
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    {
      "id": "59a5801209a6acac59836423",
      "title": "Multiply Rational Numbers",
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      "challengeSeed": [
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      "id": "59a5801209a6acac59836424",
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      "challengeSeed": [
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    {
      "id": "59a5801209a6acac59836425",
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    {
      "id": "59a5801209a6acac59836426",
      "title": "Irrational Square Roots",
      "description": [
        ""
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      "challengeSeed": [
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      "tests": [
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    }
  ]
}