MathDB

1

Part of 2011 District Round (Round II)

Problems(1)

Eight-digit multiples of 4 with & without the digit 1

Source: 2011 Czech & Slovak MO, District Round, Category A

8/13/2011
Among all eight-digit multiples of four, are there more numbers with the digit 11 or without the digit 11 in their decimal representation?
logarithmsnumber theory unsolvednumber theory