Maths

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Across
  1. 1. 20% of 100 is ?
  2. 4. Number of rings in Olympics logo
  3. 5. Square root of 64
  4. 7. HCF of 12 and 16
Down
  1. 2. 2x+4=10,Then x = ?
  2. 3. LCM of 6 and 9
  3. 6. Smallest prime number