Answer: A) 288 sq.cm Explanation: Length of the thread is 36 cms. length wise twice breath wise once then totally thrice.so 36/3 = 12.so length is 12 x 2 = 24 cmsbreath is 12 cmsArea of the book = length x breath = 24 x 12 = 288 sq.cm

Answer: C) 21, 15, 23 Explanation: Given number series is 9 17 11 19 13  Here the pattern is 9 9 + 8 = 17 17 - 6 = 11 11 + 8 = 19 19 - 6 = 13 13 + 8 = 21 21 - 6 = 15 15 + 8 = 23

Answer: A) Arachnids Explanation:

Genes are located on DNA present in the chromosome. Chromosomes are present in the nucleus of the cell.

Answer: D) All the above Explanation: The study of statistics such as births, deaths, income, or the incidence of disease, which illustrate the changing structure of human populations.   In brief, Study of both quantitative and qualitative aspects of human population. 1. Quantitative aspects include composition, density, distribution, growth, movement, size, and structure of the population. 2. Qualitative aspects are the sociological factors such as education quality, crime, diet, development, nutrition, wealth and well being.

Answer: A) An ion Explanation: An electrically charged atom or group of atoms formed by the loss or gain of one or more electrons is called an Ion. Cation: An ion is a cation (positive ion) if it is created by electron loss and is attracted to the cathode in electrolysis. Anion: An ion is an anion (negative ion) if it is created by an electron gain and is attracted to the anode.   The valence of an ion is equal to the number of electrons lost or gained and is indicated by a plus sign for cations and a minus sign for anions. Ex: Na +, Cl−, Ca ++,...

Answer: B) Rs. 432 Explanation: Here Avinash gave to Rajeev and Rajeev gave the same to Chanukya Principal amount and Time is same but the only difference is Rate of interest. Rajeev took @ 8% and gave it to Chanukya @ 6% Here the difference in interest rate = 2% 2% of 5400 should be the extra amount paid by Rajeev to Avinash Required amount = 2 x 5400 x 4100 = 432   Hence, Rs. 432 is the extra amount has to be paid by Rajeev to Avinash after 4 years.

The name Bharat is derived from the legendary king Bharat who was ancestor of kauravas and pandavas, son of King Dushyanta and Shakuntala. The name India is derived from the river Sindhu which flows in the north west of the country. The Greeks used to call us Indoi meaning the people of the Indus.