Directions : Read the following passages carefully and choose the best answer to each question out of the four alternatives. 

For months the old tanker, African Queen , lay turned over on her side, stuck fast in the sands off the coast of Maryland. She had run aground so badly that her owners had decided to leave her to her fate. It was considered impossible to refloat her and the ship began to rust and sink deeper and deeper into the sands. Men frequently came out in small boats and removed any parts that could be sold-until two men decided to attempt the impossible : to float the African Queen once more. Both men were engineers and had no experience of ships so that few people thought they could succeed. 

The men began by studying the exact state of the African Queen and came to the conclusion that she would float again if air was pumped into the tanks which were now full of sea-water. A diver was sent down to examine the underside of the ship. In the cold, dark water he found an enormous hole in her side which had been torn when the ship ran aground. It was plain that nothing could be done until the hole was repaired. As no single sheet of steel would cover it, the men were obliged to order a great number of sheets which had to be joined together. For several weeks divers worked continually to close the hole. At times, the sea was so rough that it was difficult to go down; and on more than one occasion, they had to contend with sharks. 

At last the hole was covered and the men began to pump the sea-water out of the ship’s tanks. It seemed as if they were bound to succeed, for when the tanks were full of air, the African Queen began to stir in the water. The men could not understand why she still would not float until they discovered that her rudder was embedded in mud. Huge cranes were brought to haul the sunken rudder out and the ship was again afloat. By this time, the men were almost exhausted. They had worked ceaselessly for three months to save the African Queen and had succeeded when everyone thought they would fail. Now they stood on the bridge of the ship, tired but proud, as tugs brought the African Queen into the harbour. 

Men frequently went out to the African Queen because 

The cause of Down's syndrome is.

Passage: Patriotism or love for one's country is one of the noblest sentiments of man. It is love that comes from one's gratefulness to the land where one is born, the country that provides everything that makes life worth living - food, clothing and shelter, families, friends and the way of life of its people. Or, in other words, it is our country that gives us all that we enjoy and all that makes man's life different from and richer than that of all other animals. That is why patriotic feelings are natural to man.

Which one of the following is the most appropriate title for the passage?

Two chords AB and CD of a circle with centre O intersect at P. If ∠APC = 40°. Then the value of ∠AOC + ∠BOD is

What is the smallest digit that must be added to the product 5786 × 5784 to make it a perfect square?

Which of the following was the first achievements of the Indian National Congress?

Directions: Study the following information carefully and answer the given questions: 

Eight friends A, B, C, D, W, X, Y and Z are sitting around a square table in such a way that four of them sit at four corners of the square while the other four sit in the middle of each side. The ones who sit at the four corners face outside while those who sit in the middle of the sides face inside.
C is an immediate neighbor of A, who faces the center. W sits second to the left of C. Y sits fourth to the left of W. Two persons sit between Y and D (either from left or right). C is not an immediate neighbor of D. B sits second to the right of D. X sits second to the right of B.

How many persons sit between Z and C when counted from the left of Z?