Standard 3

  CHAPTER -4 LOGICAL THINKING   • New Words: 1. Complex 2. Approach 3. Sequence 4. Goal 5. Information 6. Condition 7. Solution 8. Tasks • Keywords: 1. Complex: having many steps. 2. Approach: a way to deal with something. 3. Sequence: the order of steps. 4. Monitor: to check the progress. 5. Respectively: in the given order. • Blanks: 1. To perform a complex task, you need to break it into simple, smaller steps. 2. The goal is what you want to achieve after completing a task. 3. Conditions are the rules that you need to follow while performing a task. 4.A, AA, AB, AC, AD . 5.4, 6, 9, 13, 18, 24 . • NOTES: 1. Goal: a goal is what you want to achieve at the end of the task. 2. Information: information refers to the other details given in the task to be performed. 3. Conditions: conditions are rules that you need to follow while performing a task.     Ø  stepwise approach to performing task   These real-life examples follow a clear stepwise approach  that helps students break down more c

                                                                             4. Logical Thinking Q.1. Select the correct option. 1.  A cup of coffee costs Rs.3. You have Rs. 96. How many coffee cups can you  afford? a.  29 b.  30 c.  32 d.  34 Solution: 96/3= 32 coffees. 2.  Look at this series: 53,40, 27, ... What number should come next? a.  14 b.  12 c.  40 d.  53 Solution:  In this series,13 is subtracted to arrive at the next number. 3.  Which two pieces of paper, when put together, will make the given shape? 4.  Choose the correct mirror image of the given figure. 5.  A postcard and stamp together cost Rs. 150. The postcard costs one hundred more than the stamp. How much does the stamp cost? a.  50 b.  100 c.  25 d.  10 Solution: Postcard + stamp = 150 A postcard costs 100 more than a stamp which means: Postcard = stamp + 100 Therefore, Postcard + stamp =150       Stamp +100 =150  Stamp= 150-100 Therefore, Stamp = 50   Q.2. What do you understand by logical thinking? Explain