ledroses5256 ledroses5256

03-09-2017
Mathematics

contestada

How many 3 digit positive integers are odd and do not contain the digit 5?

Respuesta :

03-09-2017

Hello,
Assume n=a*100+b*10+c un integer positive odd with no 5.

a∈{1,2,3,4,6,7,8,9} ,#8
b∈{0,1,2,3,4,6,7,8,9},#9
c∈{1,3,7,9},#4
Number of integers searched: 8*9*4=288

Answer Link

Otras preguntas

A solution of HCl has a concentration of 1.20 x 10-2 M. What is the pH of this solution? pH = 1.20 pH = 11.2 pH = 1.92 pH = 2.33

How were the stock market crash and the collapse of the banking system related

The Retenor Morpho butterfly is among the fastest butterflies in the world, and is almost impossible for birds to catch. The blue color is thought to be a signa

What causes the difference in seasons between the Northern and Southern Hemispheres? A. The angle between magnetic and true north B. The rotation of the E

The reception of a sound creates an impulse that is carried to the CNS. What is responsible for the transmission of this impulse?

Lichens, like the one shown in the picture, are usually combinations of algae and A) fungi. B) mosses. C) orchids. Eliminate D) zooplankton.

A person leaves home at 8:00 a.m. and drives to a destination at a rate of 40 mph. The person returns at a rate of 25 mph and arrives at 2:30 p.m. How far was t

what does brutus say that anticipates the question of why the crowd should listen to mark antony

what is changs attitude toward the treatment of chinese laborers

How do composite volcanoes get its layered interior?