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Page 23 - CT&AI_CLasa_7_Part_1
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    • I am a 4-digit number.
                                          • I am less than 100.
                                          • I have only one odd digit.
                                          • The hundredths digit is the sum of the tens and ones digits.
                                          • The tens digit is three times the ones digit.
                                          • The tens digit is two times the tenths digit.
                                       What number am I?

                                             (a)  62.58                             (b)  42.36

                                             (c)  52.46                             (d)  62.38

                      cbse handbook questions

                      Tick ( ) the correct option.
                      1.  Two decimal  numbers  differ by  3.6. In  one             (a)  Sensor A
                         of the numbers, the decimal point is moved
                         one  place  to  the  right.  After this  change,           (b)  Sensor B
                         both numbers become equal. Which was the
                         smaller of  the  two  original  numbers  before            (c)  Sensor C
                         shifting the decimal point?
                                                                                    (d)  Cannot be determined
                               (a)  0.4
                                                                          3.  Alex has to fill in the blank with a DECIMAL
                               (b)  0.36                                     NUMBER formed using every digit among 0, 1,
                                                                             2, 3, and 4, each exactly once, where:
                               (c)  3.6
                                                                                • The sum of the digits before the decimal
                                                                                point is equal to the sum of the digits after
                               (d)  4
                                                                                the decimal point
                      2.  There are three sensors - A, B, and C. Each           • The digits before the decimal point are in
                         sensor displays  the  measurement  of the              descending order and the digits after the
                         length of the same item, but in different units:       decimal point are in ascending order
                         metres, centimetres, or kilometres. Only one           • The conditions of "<" are satisfied
                         sensor shows the correct  length. The  other        How many different numbers can be placed in
                         two  show values  that  are  10 times  greater      the blank?
                         and 10 times smaller than the actual length         34.201 <                  < 412.03
                         (the units remain unchanged). Based on the
                         readings  shown,  which sensor displays  the               (a)  2
                         correct length?                                            (b)  3

                                                      0.0004506                     (c)  4
                                0.04506 m  450.6 cm
                                                         km
                                                                                    (d)  More than 4
                                Sensor A    Sensor B    Sensor C

                                                                                          A Peek Beyond the Point     21

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