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Guess the next number in the given number series?
999, 990, 998, 991, 997, 992, ?
Which of the following does not belong to the group of blood relations?
Let A, B, C, D be the angles of a quadrilateral. If they are concyclic, then cosA+ cosB+ cosC+ cosD is?
Find the area of a trapezium in cm² whose parallel sides are 12 cm and 16 cm, and the distance between them is 6 cm.
A square is inscribed in a circle such that the diagonal of the square is equal to the diameter of the circle. Find the ratio of the areas of the square and the circle.
The perimeter of a square is half of the perimeter of a rectangle with length 5 cm and breadth 9 cm. Find the perimeter of the semicircle whose diameter is equal to the length of the side of the square.