A Comparative Study on the Use of the Concrete Pictorial-Abstract (CPA) Approach and the Abstract Approach in Teaching Mathematics in Primary Schools in Kenema District, Sierra Leone

Monya Edward Lamin Junior, Alhaji Mohamed Hamza Conteh, Brima Gegebe

Fibonacci and Lucas Numbers and their Bi-Complex Extension

Molhu Prasad Jaiswal, Narayan Prasad Pahari, Purushottam Parajuli, Nabaraj Adhikari

A Deterministic Inventory Model for Deteriorating Items with Biquadratic Demand, Constant Deterioration Rate and Salvage Value

M. Pradeepa, S. Sobia, M. Valliathal