1) How many 4 digit numbers can be formed using the digits 5,7,3,2 exactly once, such that the number formed is divisble by 11?

A) 16
B) 18
C) 24
D) 64
E) None of these

Ans:E



2) If a!-2a is a 3 digit integer divisible by 'a', what is the value of 2a+1?

A) 3 or 5
B) 6 or 7
C) 11 or 13
D) 3 or 13
E) 7 or 11


OA : C



3) How many 5 digit numbers formed using digits 0,1,2,3,4,5 exactly once, are divisible by 250?
A) 1
B) 2
C) 3
D) 4
E) 5


OA:B