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4.  Convert the following decimal numbers into binary:

                        a. (39)       b.  (72)       c.  (128)       d.  (55)       e.  (173)
                               10              10               10               10               10
                  D.  Application-based questions.

                      1.   Mitansh and Shreya measured their height and were trying to find the difference in binary
                         numbers. If the difference is 155 millimeters, what will be its binary conversion?
                      2.   Six friends were playing encoding-decoding game, four of them have started
                         sharing the codes based on different number systems but two of them did not
                         find any number system in which they can share. Why cannot they encode in
                         six different number systems? Help them.


                                                                                                       Subject Enrichment
                  Higher Order Thinking Skills (HOTS)

                      1.   Guess my birthdate. I’m born in 9th month of year, my date of birth is “10111” in binary.

                      2.   A group of friends were playing “Guess it right and quick”. They were supposed to answer
                         the correct number related to the code provided. Amaan gave Nissi “101110” but added this
                         number is in Binary. Help Nissi in figuring out Amaan’s number.






                    Crack The            Code                                                       Computational Thinking




                  Solve the crossword by filling it with equivalent decimal numbers or binary numbers.
                      Down                                                           1

                      1.  (10101)
                                 2                                          3
                      3.  (1111011)                   2
                                   2
                      5.  (361)
                              10                                                     5
                      7.  (6)
                           10                                           4
                      Across
                                                                                                          7
                      2.  (101)
                              10                                                 6
                      4.  (100101101)
                                      2                                          8
                      6.  (1100)
                               2
                      8.  (165)
                              10                                             9
                      9.  (1010001)
                                   2
                     10. (1101010)
                                   2
                                                                            10






                  28     Touchpad iPRIME (Ver. 2.2)–VII
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