Answer: A) 14 days Explanation: Let A worked for x days. x/21 + 4/28 = 1  => x = 18   A worked for 18 days. So, A can complete the remaining work in 18 - 4 = 14 days.

Answer: A) Attraction of the Moon Explanation:

Answer: D) All of the above Explanation: The Progressive Movement: Today, you hear the term ''progressive'' discussed a lot in politics, but progressivism is not a new concept. It was first used to describe policies and interventions of the late 19th to early 20th century, by reformers who felt the need for societal changes. The first Progressives felt called to action in response to the conditions of poverty, inequality, and corruption that were pervasive during the 19th century.

Answer: D) 14 cm Explanation: Circular piece is 4 x 11 = 44 cm long, Then Circumference of circle is given by, 44 = pi x D, where D is the diameter D = 44 / pi Take pi = 22 / 7, then D = 44 / (22/7) = (44 x 7) / 22 D = 14 cm.

Answer: A) 2 Explanation: In each row, the second figure is obtained from the first figure by adding two mutually perpendicular line segments at the centre and the third figure is obtained from the first figure by adding four circles outside the main figure.

Answer: A) 0.5 Explanation: In mathematics, a geometric progression, also known as a geometric sequence, is a sequence of numbers where each term after the first is found by multiplying the previous one by a fixed, non-zero number called the common ratio.   Herein the given sequence, 4, 2, 1, 0.5, 0.25, 0.125,... Common Ratio r = 2/4 = 1/2 = 0.5/1 = 0.25/0.5 = 0.125/0.25 == 0.5.

Answer: B) Boogie - Woogie Explanation: Pine Top Smith (1899-1929) Considered to be the originator of the Boogie -Woogie style of piano playing.

Answer: A) Lithium Explanation: Lithium is the lightest metal and the lightest solid element. It is a soft, silvery-white alkali metal. Under standard conditions. Like all alkali metals, lithium is highly reactive and flammable and is stored in mineral oil.