ledroses5256 ledroses5256
  • 03-09-2017
  • Mathematics
contestada

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

Respuesta :

caylus
caylus caylus
  • 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

explain how you can tell 31\33 is in simplest form
Cell division is preceded by two growth phases. Besides growth, both G1 and G2 a. contain checkpoints that determine if the cycle will continue. b. help move ch
Round 5.928301 to 2 decimal places
What's the square root of 0.4 repeating
Which list includes elements with the most similar chemical properties? 1.Br, Ga, Hg 2. Cr, Pb, Xe 3. O, S, Se 4. N, O, F
Who was the young Muslim scholar who figured out that isolating sick patients, in other words, quarantining them, could help prevent the spread of disease?
What are four methods that can be used to separate mixtures?
A(n) _____ is a general belief about a person or group of people that may not be true.
How you solve b-9+6b=30
Which New Deal program was struck down because it regulated commerce improperly?