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  1. Fractal, artwork
  2. Binary digits in a row
  3. Math Formulas On Chalkboard
  4. Hand doing math homework
  5. Abacus and calculator
  6. Houseleek plants
  7. Soap bubbles on a dodecahedral frame
  8. Close-up of computer keys on a document
  9. 3<4
  10. Binary digits in a row
  11. Enrico Fermi, Italian-American physicist, c. 1945-50
  12. Abacus
  13. Geometry tools
  14. Geometry set
  15. old-fashioned drawing compass
  16. Differential analyser, 1954
  17. Geometry tools
  18. E=Mc Squared
  19. Crop formation in form of Mandelbrot set
  20. old-fashioned drawing compass