Use deductive reasoning to answer the following: Martians have red tongues. Gulag is a Martian. Based on these two statements, what can you conclude about Gulag?

Use deductive reasoning to answer the following: What is the fallacy in the Raju’s reasoning in the cartoon below?

Use deductive reasoning to answer the following: All Telugu people are Indians. X is an Indian. Can you conclude that X belongs to Telugu people.

Give scientific reasons for the following statements: It is not true that human beings have evolved from chimpanzees.

Samples of four metals A, B, C and D were taken and added to the following solution one by one. The results obtained have been tabulated as follows: Use the table above to answer the following questions about metals A, B,C and D : (1) Which is the most reactive metal? (2) What would you observe if B is added to a solution of copper (II) sulphate ? (3) Arrange the metals A, B, C and D in the order decreasing reactivity .

State whether the following statements are true or false. Give reasons for your answers. Square number can be written as the sum of two odd numbers .

State any two changes that can be included under the general process of growth in human beings.

Two voltmeters A and B are used to measures a voltage a cross a resistance. Several readings are taken and represented in the following graphs. Here V_(T) is the true value of the voltage being measured. Which of the following statements is//are correct?

Take an empty bottle of the sort in which bottled water is sold. Pour about 5-10 mL of water into it and close the bottle tightly. Shake it well or leave it out in the sun for ten minutes. This causes the air in the bottle to be saturated with water vapour. Now, take a lighted incense stick. Open the cap of the bottle and allow some of the smoke from the incense sticks to enter the bottle. Quickly close the bottle once more. Make sure that the cap is fitting tightly. Press the bottle hard between your hands and crush it as much as possible. Wait for a few seconds and release the bottle. Again press the bottle as hard as you can. Now answer the following questions : What might happen you do the experiment without the smoke from the incense stick? Now try it and check if the prediction was correct. What might be happening in the above experiment in the absence of smoke particles?

(Manufacturing problem) A manufacturer has three machines I, II and III installed in his factory. Machines I and II are capable of being operated for at most 12 hours whereas machine III must be operated for atleast 5 hours a day. She produces only two items M and N each requiring the use of all the three machines. The number of hours required for producing 1 unit of each of M and N on the three machines are given in the following table : She makes a profit of Rs. 600 and Rs. 400 on items M and N respectively. How many of each should she produce so as to maximise her profit assuming that she can sell all the items that she produced? What will be the maximum profit ?