Sail E0 Webinar
Question


Find the number of 4 digit numbers which are divisible by 11 or 13 but not by 17?


Options:
A .   1133
B .   1363
C .   1455
D .   1463
E .   1123
Answer: Option B
:
B

Following are the steps while calculating the answer


4 digit numbers divisible by 11=899911=819, 4 digit numbers divisible by 13=899913=692 or 693


Number of integers common to 11 and 13 (as questionis 11 or 13) =8999(13×11)=62 or 63


To subtract numbers which are common to 11&17;13&17;11,13&17


11&17=8999(11×17)=47 or 48 terms


13&17=8999(13×17)=40 or 41


11,13,17=8999(11×13×17)=3 or 4 terms


Total ( you can approximate as the answers are far apart)= 819+693-63-48-41+4= 1364


Closest answer is option (2)



Was this answer helpful ?
Next Question

Submit Solution

Your email address will not be published. Required fields are marked *

Latest Videos

Latest Test Papers