Question 39
Written arithmetic triangle

where each number is equal to the sum of the two above it (as is evident, each row consists of one number less than the previous one, and therefore the last row will be made up of a single number), reason that the last number is a multiple of $1993$.

where each number is equal to the sum of the two above it (as is evident, each row consists of one number less than the previous one, and therefore the last row will be made up of a single number), reason that the last number is a multiple of $1993$.