• Complex math formulas on whiteboard. Mathematics and science with economics
    id: 99613287
  • Library
    id: 43474204
  • Beautiful Spirals in Nature - Phi, Golden Spiral, Fibonacci
    id: 83591388
  • Blackboard inscribed with scientific formulas and calculations in physics and mathematics.
    id: 200118693
  • wise man writing mathematical problem solution
    id: 186736380
  • The universe within. Silhouette of a man inside the universe, physical and mathematical formulas.. The concept on scientific and philosophical topics. Elements of this image furnished by NASA.
    id: 214624906
  • Numbers
    id: 5717850
  • close up of sudoku game and yellow pencil
    id: 14471542
  • Nautilus
    id: 31298366
  • Blue plastic protractor ruler
    id: 68080968
  • Blue graph paper on white background.
    id: 66240111
  • Numbers
    id: 21517682
  • Origami paper number set
    id: 70887552
  • exponentialfunktion / logarithmusfunktion
    id: 2535933
  • Beautiful Phi / Golden Ratio Spirals in Nature
    id: 99146247
  • fond de chiffres
    id: 40378617
  • Educational wooden multiplication table
    id: 71372524
  • Tape measure in centimeters
    id: 88983008
  • Gaussian or bell curve on a blackboard
    id: 34937835
  • Transparent ruler
    id: 48798855