Rwanda's national flag has a golden sun with 24 rays. The sun appears in the upper fly-side corner of the flag, set against the light-blue upper band.
The current flag was adopted on December 31, 2001, after Rwanda sought new national symbols following the 1994 genocide. Artist and engineer Alphonse Kirimobenecyo designed it. The light-blue, yellow, and green bands represent peace and happiness, economic development, and hope for prosperity.
The sun symbolizes national unity, transparency, and enlightenment. Its 24 rays are separated from the sun's central disk by a blue ring and do not touch the circumference. This precise construction detail is why counting rays in a stylized drawing can sometimes be misleading.
A common mix-up is Rwanda's earlier flag, a red-yellow-green tricolour used from 1961 to 2001. That design had a black “R” at its centre and no golden sun, so the 24-ray answer applies specifically to the current flag.