Question

what is the value of M and N respectively ? If M3904858N is divisible by 8 and 11;where M and N take integer values from 0 to 0 ?

Answer 1

 plugged in numbers 
First you have to recall divisibility rules 
for 8- If the last three digits are divisible by 8, the number is also 

for 11 - Subtract the sum of the even digits from the sum of the odd digits; if the difference, including 0, is divisible by 11, the number is also. 


So M......58N , eliminate cases in the ans choice where N is 8 and 6 because we know 586 and 588 cannot be evenly divided by 8. 

4 works for N because 584/8 = 73. 

Looking at 584, you can already tell the ansewr is E because if it is not divisible by 11 but to be sure, 

Plug in 5 and 6 for M and apply the divisiblilty rule for 11 anser is still E

Hope This Helps :)