* ABRSM (Associated Board of the Royal Schools of Music): Scales should be played at a moderately fast speed of approximately crotchet (quarter notes) = 108-120 beats per minute (bpm) for major keys and 100-112 bpm for minor keys.
* Trinity College London: Scales should be played at a fast speed, with a suggested tempo range of crotchet (quarter notes) = 112-132 bpm for major keys and 96-120 bpm for minor keys.
* RCM (Royal Conservatory of Music): The recommended tempo for Grade 4 piano scales ranges from crotchet (quarter notes) = 108-144 bpm for major scales and 96-126 bpm for minor scales.
It's important to note that these are approximate speed ranges, and the actual requirement might differ slightly based on the specific scale and the examiner's expectations. It is always advisable to refer to the specific syllabus and guidelines provided by your chosen examination board for the exact tempo expectations.