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Of the following, which reads the same forwards, backwards, and upside down (when viewed on a calculator screen)?
(A) 6889
(B)1991
(C)1961
(D) 1881


Sagot :

Answer: D 1881

Step-by-step explanation: 6889 and 1961 don't read the same forwards and backward. 1991 upside down is 1661. So, only 1881 works