Problems(2)
total no of intersections of 3 lines in plane (HOMC 2011 J Q1)
Source:
7/25/2019
Three lines are drawn in a plane.
Which of the following could NOT be the total number of points of intersections?(A) (B) (C) (D) (E) They all could.
combinatorial geometrygeometry
divisible by 8 or at least one of its digits is 8 (HOMC 2011 Q1)
Source:
7/25/2019
An integer is called "octal" if it is divisible by or if at least one of its digits is .
How many integers between and are octal?(A): , (B): , (C): , (D): , (E):
number theorydivisible