Albert Einstein

  [Gibraltar 1998; Italy 1979; Monaco 1979; Nicaragua 1971; Togo 1979]

A natureza da luz

[Germany 1979, 1994; Netherlands 1929; Nicaragua 1971; Portugal 1974; San Marino 1991; Sweden 1978]

Física matemática

[East Germany 1975; France 1958, 1994; Germany 1979, 1984, 1994; Nicaragua 1994]

Carl Friedrich Gauss

Carl Friedrich Gauss (1777–1855) lived in Göttingen and worked in many areas, ranging from complex numbers (numbers of the form a + bi, where i2 = –1) to astronomy and electricity. He gave the first satisfactory proof that every polynomial equation has a complex root, and in number theory he initiated the study of congruences and proved the law of quadratic reciprocity.
 Gauss also investigated which regular polygons can be constructed with ruler and compasses, proving that a regular n-gon can be so constructed when n is a power of 2 times a product of different Fermat primes of the form 2k + 1 (where k is a power of 2) such as 17 (as shown on the East German stamp) or 65,537.  
[East Germany 1977; Germany 1955, 1977; Nicaragua 1994]

Gravitaçãoo de Newton

[Great Britain 1987; Grenada 1987; Monaco 1987; Nicaragua 1971; North Korea 1993]

Logaritmos

[Nicaragua 1971; Slovenia 1994; Yugoslavia 1955]

Arquimedes

[Greece 1983; Italy 1983, 2013; Nicaragua 1971; Spain 1963]

O teorema de Pitágoras

[Greece 1955; Macedonia 1998; Nicaragua 1971; Korea 2014; Surinam 1972]

Contar pelos dedos

[Iran 1966; Mexico 1939; Nicaragua 1971]

Dez fórmulas Matemáticas

 [Nicaragua 1971]