Questions
The number of ordered pairs such that is a multiple of 5 is
detailed solution
Correct option is A
As the last digit of 6m,m∈N is 6,6m+9n will be divisible by 5 if the unit’s digit of 9n is 4 or 9. This is possible when n is odd.∴ required number of ordered pairs = 50 x 25 =1250.Similar Questions
The number of integral solutions of is
799 666 8865
support@infinitylearn.com
6th Floor, NCC Building, Durgamma Cheruvu Road, Vittal Rao Nagar, HITEC City, Hyderabad, Telangana 500081.
JEE Mock Tests
JEE study guide
JEE Revision Notes
JEE Important Questions
JEE Sample Papers
JEE Previous Year's Papers
NEET previous year’s papers
NEET important questions
NEET sample papers
NEET revision notes
NEET study guide
NEET mock tests