Question
Which of the following elements should come in a place
‘?’ ? EG8  IK12  MO16  ?Solution
E + 4 = I; I + 4 = M; M + 4 = Q G + 4 = K; K + 4 = O; O + 4 = S 8 + 4 = 12; 12 + 4 = 16; 16 + 4 = 20
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