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2

Part of 2022 IOQM India

Problems(1)

IOQM 2022 P2

Source:

3/8/2022
Ria writes down the numbers 1,2,⋯ ,1011,2,\cdots, 101 in red and blue pens. The largest blue number is equal to the number of numbers written in blue and the smallest red number is equal to half the number of numbers in red. How many numbers did Ria write with red pen?
IOQM