Kannur University 2006 MATHEMATICS - Question Paper

14, 16, 21, 9, 16, 17, 14, 12, 11 and 20 is
(A) 10 (B) 13
(C) 15 (D) 12.
15. Standard deviation of a particular data is 4·5. Then its variance is
(A) 9·0 (B) 16·25
(C) 2·25 (D) 20·25.
16. H.C.F. of 3a – 15 and 3a two – 75 is
(A) ( a + five ) (B) three ( a – five )
(C) ( a – five ) (D) three ( a + five ).
17. H.C.F. and L.C.M. of 2 algebraic expressions are ax and 12ax two b three y respectively.
If 1 of the expressions is 4axy, then the other is
(A) 3xa two b two (B) 3x two a
(C) 3x two ab three (D) 3xab two .
18. x two + y two + z two – xy – yz – zx expressed in S notation is
(A) S
xyz
xy (B) S
xyz
x two + y 2
(C) S
xyz
x ( x – y ) (D) S
xyz
xyz.
5 81-E (NS)
? [ Turn over
19. S
abc
a two ( b two – c two ) when expanded and simplified
(A) a two b two – a two c two (B) a two b two – a two c two + b two c 2
(C) a two b two + b two c two + c two a two (D) 0.
20. If a + 2b + 3c = 0, then the value of a three + 8b three + 27c three is
(A) 3abc (B) 0
(C) 18abc (D) 6abc.
21. Factors of ( a four + a two b two + b four ) are
(A) ( a two + b two ) ( a two – b two )
(B) ( a two + ab + b two ) ( a two – ab + b two )
(C) ( a two + b two + ab ) ( a two – b two + ab )
(D) ( a two + b two + ab ) ( b two – a two – ab ) .
22. Sum of three a , – 13 a and six a is
(A) – 22 a (B) four a
(C) 22 a (D) – four a .
23. Value of ( two 2 + three 3 )
2
is
(A) 35 + 12 six (B) 35
(C) 13 + 12 six (D) four two + nine three + 12 six .
24. Conjugate of x – y is
(A) x – y (B) x + y
(C) x + y (D) x – y .
25. General form of a pure quadratic formula is
(A) ( bx + c ) two = 0 (B) ax two + bx + c = 0
(C) ax two + c = 0 (D) ax two + bx = 0.

Earning:   Approval pending.