MATHEMATICS

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Across
  1. 2. Sum of Binomial coefficients in (a+b)^4 expansion
  2. 3. Portion of a circle
  3. 5. (1/10th) of a US Dollar
  4. 7. A Latin word meaning 100
  5. 9. This prefix means "ten"
  6. 10. A smooth curve joining two points
  7. 11. A list or a note explaining meaning of each symbol on a graph
  8. 13. x in a^x form
  9. 16. A decimal based system of measurement
  10. 19. Ratio of distance travelled to time taken
  11. 20. A number that divides the given number leaving zero remainder
  12. 21. Opposite of exponentiation
Down
  1. 1. Real number which are less than zero
  2. 4. A unit of linear measure
  3. 6. One part in every hundred
  4. 7. 250 in Roman Number
  5. 8. ___radians made in 1 sec by a wheel which makes 360 revolutions in 1min
  6. 12. This is also HCF of given number
  7. 14. Mathematician who invented Calculus
  8. 15. An acronym used to remember the correct order of operations for solving algebraic equations
  9. 17. Number of subsets in a set containing 3 elements
  10. 18. A type of inequality