We use cookies to personalise content and advertisements and to analyse access to our website. Furthermore, our partners for online advertising receive pseudonymised information about your use of our website. cookie policy and privacy policy.
 
+0  
 
0
251
3
avatar

How many numbers between 1 and 100 (inclusive) are divisible by 7 or 10?

 Mar 2, 2018
 #1
avatar+18138 
+1

100/7 = 14 .28 ~ 14 numbers

100/10 =10 numbers

24 numbers total are divisible by 10 or 7

 

One number ( 70 ) is divisible by 10 AND 7

 Mar 2, 2018
 #2
avatar+99736 
+1

N (divisible  by 7 or 10)   = N(divisible by 7)  + N (divisible by 10)   -  N (divisible by 7 and 10)  =

 

(14)   +  (10)  -   1   =

 

23

 

 

 

cool cool cool

 Mar 2, 2018
 #3
avatar+18138 
0

Ack ! TRUE !    I counted 70 twice...bummer !

ElectricPavlov  Mar 2, 2018

20 Online Users

avatar
avatar
avatar