The Three ThousandthIn this addition digits have been consistently replaced by letters, different letters representing different digits. But instead of an addition in base 10 in which the letters represent the digits 0 to 9 this is an addition in base 11, using X for the extra digit, in which the letters represent the digits 1 to X, with 0 unused. Please submit the number (still in base 11) represented by TEASER. Send your solution to: The Sunday Times Teaser 3000, PO Box 29, Colchester, Essex CO2 8GZ or email puzzle.entries@sunday-times.co.uk. The first two correct solutions opened after next Saturday win £20.

Source: The Times March 20, 2020 16:30 UTC