Mathematics Teacher (1968) Vol. 61, No. 4

  • Mathematics Teacher (1968) Vol. 61, No. 4

    NATIONAL COUNCIL OF TEACHERS OF MATHEMATICS APRIL 1968 VOLUME LXI, NUl\IDER 4 Congruence Geometry for Junior High School l V alter J. Sanders and J . Richard Dennis Divisibility by 7, 11, 13, and Greater Primes R . L. Morton Mathematics by Analogy James M. 111 oser Gaussian, Parabolic, and Hyperbolic Numbers William Mi