## QA – Placement Quizzes | Progressions | Question 12

log1010 + log10102 + … + log1010n (A) n2 + 1 (B) n2 – 1 (C) [(n2 + n)/2] * [(n(n+1))/3] (D) (n2 + n)/2… Read More »

log1010 + log10102 + … + log1010n (A) n2 + 1 (B) n2 – 1 (C) [(n2 + n)/2] * [(n(n+1))/3] (D) (n2 + n)/2… Read More »

The average of 7 consecutive number is P. If the next three numbers are also added, the average shall: (A) Remain unchanged (B) Increase by… Read More »

A tennis ball is initially dropped from a height of 180 m. After striking the ground, it rebounds (3/5)th of the height from which it… Read More »

If the product of n positive integers is nn, then their sum is: (A) A negative integer (B) Equal to n (C) Equal to n+(1/n)… Read More »

A man is watching from the top of a tower a boat speeding away from the tower. The boat makes an angle of depression of… Read More »

A man standing at a point P is watching the top of a tower, which makes an angle of elevation of 30° with the man’s… Read More »

From a point P on a level ground, the angle of elevation of the top of a tower is 30 degrees. If the tower is… Read More »

The angle of elevation of the sun, when the length of the shadow of a tree is √3 times the height of the tree, is:… Read More »

The radii of two cones are in the ratio 2:1, their volumes are equal. Find the ratio of their heights. (A) 1:8 (B) 1:4 (C)… Read More »

The volumes of two sphere are in the ratio of 64:27. The ratio of their surface areas is: (A) 1:2 (B) 2:3 (C) 9:16 (D)… Read More »

If three metallic spheres of radii 6 cm, 8 cm and 10 cm are melted to form a single sphere, the diameter of the new… Read More »

A solid piece of iron of dimensions 49 * 33 * 24 cm³ is molded into a sphere. The radius of the sphere is: (A)… Read More »

A cylindrical vessel of radius 4 cm contains water. A solid sphere of radius 3 cm is lowered into the water until it is completely… Read More »

A solid metallic spherical ball of diameter 6 cm is melted and recast into a cone with diameter of the base as 12 cm. The… Read More »

A hollow sphere of internal and external diameters 4 cm and 8 cm respectively is melted into a cone of base diameter 8 cm. The… Read More »