#### PROBLEMS WITH NATURAL NUMBERS

Article by Carmen-Victorița Chirfot-Romania PROBLEMS WITH NATURAL NUMBERS

#### TRIGONOMETRIC REPREZENTATION OF PI

Article by Jamal Issah Agbanwa-Ghana TRIGONOMETRIC-REPRESENTATION-OF-PI

#### ON SEQUENCE A343010 IN OEIS

Math Note by Amrit Awasthi-Punjab-India ON SEQUENCE A343010 IN OEIS

Article by Mohammed Bouras-Morocco LEGENDRE FORMULA IN TERMS OF THE PRIME COUNTING FUNCTION-REVISITED

#### INVARIANT FOR ODD NUMBERS UNDER TETRATION

Article by Pranjal Jain-India INVARIANT FOR ODD NUMBERS UNDER TETRATION

#### ABOUT A SURJECTIF SEQUENCE

Math Note by Ioan Serdean-Romania Edited by Florica Anastase-Romania ABOUT A SURJECTIF SEQUENCE

#### A NEW PROOF FOR GENERALIZED WILSON’S THEOREM

Math Note by Angad Singh-Pune-India A NEW PROOF FOR GENERALIZED WILSON’S THEOREM