If a and b are two odd positive integers, by which of the following integers is (a4 - b4) always divisible?
3
6
8
12
If x * y = (x + 3)2 (y - 1), then the value of 5 * 4 is
192
182
180
172
is
10
100
1000
None of these
If X * Y = X2 + Y2 - XY, then 11 * 13 is
117
147
290
433
If a and b are odd numbers, then which of the following is even?
a + b + ab
a + b - 1
a + b + 1
a + b + 2ab
If a1/3 = 11, then the value of a2 - 331 a is
1331331
1331000
1334331
1330030
If then the value of is
If a2 + b2 + c2 = 2 (a - b - c) - 3, then the value of 2a - 3b + 4c is
1
2
4