The mean of `1^2,\ 2^2,\ 3^2,\ 4^2,\ 5^2,\ 6^2,\ 7^2` is (a) 10 (b) 20 (c) 30 (d) 40

The value of the determinant =1^2 2^2 3^2 4^2 2^2 3^2 4^25^2 3^2 4^25^2 6^2 4^2 5^2 6^2 7^2 is equal to 1 b. 0 c. 2 d. 3

If 2p+3q=18 and 2p-q=2, then 2p+q=?( a) 6 (b) 7 (c) 10 (d) 20

If x^2+a x+10=0 and x^2+b x-10=0 have common root, then a^2-b^2 is equal to 10 (b) 20 (c) 30 (d) 40

If a + b =8, a -b =4, then a^2 + b^2 is equal to (A) 20 (B) 40 (C ) 10 (D) 30

Let a,b,c,d,e,f,g,h be distinct elements in the set {-7,-5,-3,-2,2,4,6,13} . The minimum value of (a+b+c+d)^2 + (e+ f + g + h)^2 is:(1) 30 (2) 32 ( 3) 34 ( 4) 40

Let a,b,c,d,e,f,g,h be distinct elements in the set {-7,-5,-3,-2,2,4,6,13} . The minimum value of (a+b+c+d)^2 + (e+ f + g + h)^2 is:(1) 30 (2) 32 ( 3) 34 ( 4) 40

Let a,b,c,d,e,f,g,h be distinct elements in the set {-7,-5,-3,-2,2,4,6,13} . The minimum value of (a+b+c+d)^2 + (e+ f + g + h)^2 is:(1) 30 (2) 32 ( 3) 34 ( 4) 40

The mode of the data -3, 4, 0, 4, -2, -5, 1, 7, 10, 5 is : A. 0 B. 4 C. -2 D. 7

If points (1,\ 2),\ (-5,\ 6) and (a ,\ -2) are collinear, then a= (a) -3 (b) 7 (c) 2 (d) -2

The value of 3/(1^2. 2^2)+5/(2^2. 3^2)+7/(3^2. 4^2)+9/(4^2. 5^2)+(11)/(5^2. 6^2)+(13)/(6^2. 7^2)+(15)/(7^2. 8^2)+(17)/(8^2. 9^2)+(19)/(9^2. 10^2) is 1/(100) (b) (99)/(100) (c) 1 (d) (101)/(100)