Find out the letters of English alphabet or any other language known to you in which the image formed in a plane mirror appears exactly like the letter itself. Discuss your findings.

Consider the letters of English alphabets, A to Z. List among them the letters which have (a) vertical lines of symmetry (like A)

Consider the letters of English alphabets, A to Z. List among them the letters which have (b) horizontal lines of symmetry (like B)

100 surnames were randomly picked up from a local telephone directory and the frequency distribution of the number of letters in the English alphabets in the surnames was obtained as follows: Determine the median number of letters in the surnames. Find the mean number of letters in the surnames? Also, find the model size of the surnames.

No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be ……..

Find the number of 4 letter words with or without meaning, which can be formed out of the letters of the word 'FATE' where the repetition of the letter is not allowed.

No matter how far you stand from a mirror, your image appears erect. The mirror is likely to be