Latest NDA Aptitude Question SOLUTION: The mirror used for the head light at a car is -
(A) spherical concave (B) plane
(C) cylindrical (D) parabolic concave
Pure mathematics is the world's best game. It is more absorbing than chess, more of a gamble than poker, and lasts longer than Monopoly. It's free. It can be played anywhere - Archimedes did it in a bathtub.
Richard J. Trudeau, Dots and Lines
mathematics is the indispensible instrument of all physical research