Instruction regarding Numerology from the Qur'an and its application in prayer

Leaves: 1; Pages: 2; Measurements: 9.5cm x 9cm; Dates Unknown; Script: Akauku Mfemfe and Arabic script; Condition: Poor (ripped); Comments: This is perhaps written on an old envelope, as a partial stamp (postage stampcancellation?) can be seen reading “Bamenda Under British [Mandate/Trusteeship?]”.