Rhythm Is a Mystery by K Class first appeared on the Israeli foreign-music chart on 19 Nov 1991, entering at #28. It peaked at #15 on 10 Dec 1991. In total it spent 4 weeks on the chart, last charting on 10 Dec 1991.
| Wk | Date | Pos |
|---|---|---|
| 1 | 19 Nov 1991 | 28 |
| 2 | 26 Nov 1991 | 21 |
| 3 | 3 Dec 1991 | 16 |
| 4 | 10 Dec 1991 | 15 |