Q.6. If l + m + n = 9 and l2 + m2 + n2 = 31, then the value of lm + mn + nl will be
(A) 22
(B) 50
(C) 25
(D) -25
Q.7.In a triangle PQR, the side QR is extended to S. ∠QPR = 72° and ∠PRS = 110°, then the value of ∠PQR is:
(A) 38°
(B) 32°
(C) 25°
(D) 29°
Q.8.In a trapezium ABCD, AB || CD, AB < CD, CD = 6 cm and distance between the parallel sides is 4 cm. If the area of ABCD is 16 cm2, then AB is
(A) 1 cm
(B) 2 cm
(C) 3 cm
(D) 8 cm
Q.9.If tanθ + cotθ = 5, then the value of tan2 θ+ cot2 θ is
(A) 22
(B) 25
(C) 23
(D) 27
Q.10.When a number is divided by 56, the remainder will be 29. If the same number is divided by 8, then the remainder will be
(A) 6
(B) 7
(C) 5
(D) 3
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