self Maths Puzzle

a number has 2 at its unit place ,when it is doubled we get the same number but 2 shifted from unit place to starting of number. find the number

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self Other Question

5+2+3=101522 How? A biologist wants to estimate the number of elk in a wildlife preserve. She sedates 125 elk and clips a small radio transmitter onto the ear of each animal. The elk returns to the wild, and after 6 months, the biologist studies a sample of 920 elk in the preserve. Of the 920 eld sampled, 34 have radio transmitters. Approximately how many elk are in the whole preserve?