Test For Postal/Sorting Assistant Examination

Explanation
The President of India is the constitutional head of the country. The President is the highest authority in the Indian political system and is responsible for the appointment of the Prime Minister, Chief Justice of the Supreme Court, and other key positions. The President also has the power to veto legislation and grant pardons. Therefore, the President holds the highest position in the Indian government and is considered the constitutional head of India.

Explanation
If a new state of the Indian Union is to be created, the amendment of the First Schedule of the constitution is required. The First Schedule of the constitution lists the names of the states and territories of India, and any addition or creation of a new state would require an amendment to this schedule.

Explanation
The correct answer is "An Unknown Indian" because the question asks who invented zero, which is a concept in mathematics. Zero was first introduced by an unknown Indian mathematician. The concept of zero is essential in mathematics as it represents the absence of a value and is used in various calculations and number systems. Although the specific identity of the Indian mathematician who invented zero is unknown, their contribution to mathematics is significant.

Explanation
Mumbai is the correct answer because it is the city in India that has the largest natural harbor. The natural harbor of Mumbai, known as the Mumbai Harbour, is one of the largest and busiest ports in the country. It provides a strategic location for trade and commerce, making Mumbai a major economic hub in India. Cochin, Kolkata-Haldia, and Vishakapatnam also have natural harbors, but they are not as large or significant as the one in Mumbai.

Explanation
Newton's law of gravitation is a universal law that applies to all objects, regardless of their size or mass. It states that every object in the universe attracts every other object with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them. This law applies to both light and heavy bodies, including heavenly bodies such as planets, stars, and galaxies. It also applies to atoms, which are the fundamental building blocks of matter. Therefore, the correct answer is "Universal."

Explanation
The femur is the longest bone in the human body. It is located in the thigh and extends from the hip to the knee. The femur is responsible for supporting the weight of the body and is crucial for walking, running, and other activities that involve lower body movement. It is also a major site for muscle attachment, making it an important bone for overall body strength and mobility.

Explanation
MERCOSUR is a regional trade bloc in South America, which stands for the Southern Common Market. It was established to promote free trade and economic cooperation among its member countries. Latin America is the correct answer because MERCOSUR consists of countries from this region, such as Argentina, Brazil, Paraguay, and Uruguay. Africa, Asia, and South East Asia are not part of MERCOSUR.

Explanation
Malaria affects the liver. When a person is infected with malaria, the parasites initially travel to the liver where they multiply and mature. This stage of the infection is known as the liver stage. The parasites then leave the liver and enter the bloodstream, where they infect and destroy red blood cells, causing the characteristic symptoms of malaria such as fever, chills, and fatigue. Therefore, the liver is a crucial organ in the life cycle of the malaria parasite and is directly affected by the disease.

Explanation
The overall percentage of loss can be calculated by finding the difference between the cost price and the selling price of both articles and then dividing it by the total cost price. In this case, let's assume the cost price of the first article is 3x and the cost price of the second article is 2x. The selling price of the first article would be 0.6 * 3x = 1.8x, and the selling price of the second article would be 1.3 * 2x = 2.6x. The total cost price would be 3x + 2x = 5x. The overall percentage of loss would be (5x - (1.8x + 2.6x)) / (5x) * 100 = 12%.

Explanation
If 12 boys can earn Rs 2400 in 5 days, it means that each boy can earn Rs 200 in 5 days. Therefore, in 21 days, each boy would earn Rs 200 * 21/5 = Rs 840. To find out how many boys can earn Rs 4200 in 21 days, we divide Rs 4200 by Rs 840, which gives us 5. Therefore, the answer is 5 boys.

Explanation
Febrile is an adjective that describes someone who has a fever. It is derived from the Latin word "febris" which means fever. Therefore, the correct answer is "feverish" as it directly relates to having a fever. The other options, senile, shaking, and weak, do not have any direct connection to the term febrile.

Explanation
The circumference of a circular wheel is given by the formula C = 2πr, where r is the radius of the wheel. In this case, the radius is 1.75 m. To find the number of revolutions the wheel will make in covering 11 km, we need to convert the distance to meters and divide it by the circumference of the wheel. 11 km is equal to 11,000 m. So, the number of revolutions is 11,000 / (2π * 1.75) ≈ 1000. Therefore, the correct answer is 1000.

Explanation
The given question states that in 5 years, Rs 2000 becomes Rs 5000. This means that the amount increased by Rs 3000 in 5 years. To find out how many years it will take for Rs 700 to become Rs 910 at the same ratio, we need to find the increase in amount. Rs 910 - Rs 700 = Rs 210. Since the ratio is the same, the increase in amount is also the same. Therefore, it will take 1 year for Rs 700 to become Rs 910.