In this task, you need to answer the given multiple-choice question on the general math. Classify your answers into 'a', 'b', 'c', 'd', and 'e'.

[EX Q]: Problem: pure milk costs 3.60 per litre . a milkman adds water to 25 litres of pure milk and sells the mixture at 3 per litre . how many litres of water does he add ? 
Options: a ) 2 litres , b ) 5 litres , c ) 7 litres , d ) 11 litres , e ) none of these
[EX A]: b

[EX Q]: Problem: what is the dividend ? the divisor is 800 , the quotient is 594 , and the remainder is - 968 . 
Options: a ) 6623 , b ) 43036 , c ) 51515 , d ) 474232 , e ) 2025
[EX A]: d

[EX Q]: Problem: how many two - digit numbers that do not contain the digits 1 or 4 are there ? 
Options: a ) 112 , b ) 56 , c ) 64 , d ) 49 , e ) 84
[EX A]:
b