And again, due to the fact that there room 5 "20s" in 100, climate 5 x 4 = 20 number divsible by 5.
You are watching: How many numbers between 1 and 100 (inclusive) are divisible by 4 or 9?
However, we have to subtract out the number divisible through both 4 and also 5 to protect against "double counting."
These would certainly be 20, 40, 60, 80 and 100.
Thus, we have 25 + 20 - 5 = 40 numbers divisible by 4 or 5 indigenous 1-100, inclusive.
CPhill May 20, 2014
1+0 Answers
#1

+8
finest Answer
Let"s think around it in groups of 20.
Note, native 1 come 20, 5 numbers are divisible through 4.....4, 8, 12, 16, 20
And because there are 5 "20s" in 100, climate 5 X 5 = 25 number divisible by 4.
Likewise, there are 4 number divisible through 5.......5 , 10 , 15 , 20
And again, due to the fact that there room 5 "20s" in 100, then 5 x 4 = 20 number divsible through 5.
However, we have to subtract out the number divisible by both 4 and 5 to stop "double counting."
These would be 20, 40, 60, 80 and also 100.
Thus, we have actually 25 + 20 - 5 = 40 number divisible through 4 or 5 from 1-100, inclusive.
CPhill May 20, 2014
Post new Answer
26 digital Users


Top Users











Sticky Topics
Some indict for inquiry askers.
What is keep going 5
Again a number puzzle. Multiply in writing.
Loads of fun printable number and logic puzzles
¤¤¤¤Welcome to 6294.org¤¤¤¤
How to display screen latex properly
Feature questions 1 - began 8th might 19
Filter Issues
How to upload a picture.
See more: Symbols In The Road By Cormac Mccarthy, The Road Symbols, Imagery, Allegory
If a question is ticked that does not median you cannot proceed it.
Should you consider anything prior to you answer a question?
Geometry Thread
PUZZLES
LaTex Coding
https://www.desmos.com/calculator/bsh9ex1zxj
Is PROCRASTINATION a problem for friend ?
Historical post!
What is happening? plunder #4
Great inquiries to discover From 2
Great answers to find out From
About
Links
Contact
Withdraw cookie consent
6294.org 6294.org.0rechner.de 6294.org.es 6294.org.fr 6294.org.in 6294.org.ru