3. Some numbers read the same from left to right as they do from right to left (for example, 2772, 515), such numbers are called "palindromic numbers." Now there is a two-digit number, when it is multiplied by 91, 93, 95, 97, the products are all palindromic numbers. This two-digit number is $\qquad$.
【Answer】 55
【Analysis】Divisibility + Digit Analysis
Let's assume this two-digit number is $\overline{a b}$, because $\overline{a b} \times 95$ results in a palindrome,
thus, the first and last digits of the product are $5, b$ is an odd number, $\overline{a b} \times 95=\overline{5 c c 5}$,
(Estimation) Also, since $95 \times 53=5035, 95 \times 65=6175$, (we can try $95 \times 55=5225$) it indicates that $\overline{a b}$ is between 53 and 65;

Furthermore, a four-digit palindrome is always a multiple of 11, therefore, $\overline{a b}$ can only be 55.