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S seema garhwal
5. (i) Square has 4 sides.   Counting every corner Thrice and no more! Implies we go around square thrice,i.e. 12 times. Add the count to me To get exactly thirty - four! Let us assume the number as y, we get 34.  12+y=34   So, 22 is the number .   (ii) If 23 is number for Sunday.    Then counting up, Saturday is 22, Friday is 21, Thursday is 20.  Wednesday is 19, Tuesday is 18, Monday is 17...

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S seema garhwal
(d)   m 5 6 7 8 9 10 11 12 13 14 15 m - 7 -2 -1 0 1 2 3 4 5 6 7 8   At m=10, m-7 = 3 Thus, m=10 is  the solution    

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S seema garhwal
(c)   z 8 9 10 11 12 13 14 15 16 17 18 19 20 3 4 5 6 At z = 12 , Thus, z= 12 is a solution.

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S seema garhwal
(b)   t 3 4 5 6 7 8 9 10 11 12 13 14 15 16 5t 15 20 25 30 35 40 45 50 55 60 65 70 75 80 At t=7, 5t = 35 Thus, t = 7 is the solution.  

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S seema garhwal
(a) m 1 2 3 4 5 6 7 8 9 10 11 12 13 m+10 11 12 13 14 15 16 17 18 19 20 21 22 23    At m = 6, m+10=16      Thus, m =6 is a solution.                  

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S seema garhwal
   (a) Putting given values in LHS.                                                                                 m = 10 is not a solution.                             m = 12 is a solution.                                                                                   m = 5 is not a solution.                              m = 15 is not a solution.       (b) Putting given values in LHS.    ...

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S seema garhwal
    S. no. Equation Value of variable Equ.satisfied Yes/No Sol. of LHS (a) 10 y =80   y = 10      No (b) 10 y = 80   y = 8      Yes (c) 10 y = 80     y = 5       No (d)  4l = 20    l = 20        No   (e)  4l = 20   l = 80         No (f)  4l = 20    l =5         Yes (g)   b + 5 =9   b = 5          No (h)   b + 5=9  b = 9           Yes (i)   b+5=9   b = 4        ...
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