HARD
IOQM - PRMO and RMO
IMPORTANT
Earn 100

A natural number is called good if there exist natural numbers such that . Let be the sum of the first good numbers, . Find the sum of all values of for which is an integer.

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Important Questions on Sequence and Series
EASY
IOQM - PRMO and RMO
IMPORTANT
Consider the set of all positive integers such that when divided by , respectively, the remainders (in that order) are all and form a non-constant geometric progression. If is the largest element of , then find .

MEDIUM
IOQM - PRMO and RMO
IMPORTANT
Let where there are hundred in the last term in the sum. How many times does the digit occur in the number ?
