`(-2)x\ (-9)-6\ x\ (-8)` is equal to: (a) 156 (b) 60 (c) `-156\ ` (d) `-60`

(-12)\xx\ (-9)-6\ xx\ (-8) is equal to: (a) 156 (b) 60 (c) -156\ (d) -60

4 a 2 b 3 x 3a b 2 x 5 a 3 b is equal to: (a) 60 a 3 b 5 (b) 60 a 6 b 5 (c) 60 a 6 b 6 (d) a 6 b 5

If (x ,\ 2),\ (-3,\ -4) and (7,\ -5) are collinear, then x= (a) 60 (b) 63 (c) -63 (d) -60

If (45)/(60) is equivalent to 3/x , then x= (a) 5 (b) 4 (c) 6 (d) 20

The product (x^2-1)(x^4+x^2+1) is equal to: (a) x^8-1 (b) x^8+1 (c) x^6-1 (d) x^6+1

4 a 2 b 3 x 3a b 2 x 5 a 3 b is equal to: 60 a 3 b 5 (b) 60 a 6 b 5 (c) 60 a 6 b 6 (d) a 6 b 5

(2tan30^@)/(1-tan^2 30^@) is equal to (a) cos60^@ (b) sin60^@ (c) tan60^@ (d) sin30^@

The term independent of x in the expansion of ((1)/(60) - (x^(8))/(81)).(2x^(2) - (3)/(x^(2)))^(6) is equal to (A) -72 (B) 36 (C) -36 (D) -108

If (45)/(60) is equivalent to 3/x , then x= 5 (b) (4) (c) 6 (d) 20