Q
Hard 1 Mark
Islamic Studies Caliphate & Rulers: From the Rightly Guided Caliphs to the Ottoman Caliphate
The total number of Abbasid Caliphs was:
Explanation
The Abbasid Caliphate had a total of 37 Caliphs ruling from 132 AH to 656 AH — a period of approximately 524 years.
Reference: Islamic Studies - Caliphate & Rulers , Page 8
Hint
Compare: Umayyads had 14 Caliphs; Ottomans had 36 Sultans/Caliphs.