Find the wrong number in the series from the given alternatives. 17, 36, 53, 68, 83, 92

Calculate consecutive differences: 36-17=19, 53-36=17, 68-53=15, 83-68=15, 92-83=9. The pattern should be decreasing odd numbers: 19, 17, 15, 13, 11. The fourth difference should be 13 (not 15), making the fifth term 68+13=81, not 83. The next term would then be 81+11=92, which matches. Therefore 83 is the wrong number. The other options (53, 68, 92) fit the corrected pattern correctly.