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Question 1
If a and b are two odd positive integers, by which of the following integers is (a4 – b4) always divisible
Question 2
If 
then y is equal to
then y is equal to Question 3
If 
and 
; then (x + y) is equal to
and ; then (x + y) is equal to Question 4
If three numbers are added in pairs, the sum is equal to 10, 19 and 21. Find the difference between greatest and smallest.
Question 5
If a = x + y , b = x - y , c = x + 2y , then a2 + b2 + c2 - ab - bc - ca is:
Question 6
If 
and 
then the value of xy is
and then the value of xy is Question 7
If x2 + y2 = 29 and xy = 10, where x>0, y>0, x>y then the value of 
is
isQuestion 8
If 
then the value of m3-3m2+3m+3n+3n2+n3 is
then the value of m3-3m2+3m+3n+3n2+n3 is Question 9
If 
, then 
is
, then isQuestion 10
The value of 
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Nov 13CDS & Defence
