Question 28
The Philippines is divided into 17 regions: R1, R2, R3, R4A, R4B, R5, CAR, NCR, R6, R7, R8, R9, R10, R11, R12, R13 and BARMM. What is the minimum number of students each of whom comes from one of the 17 regions must participate in PIMSO-Mathematics National Round to guarantee that there are at least 100 students who come from the same region?