Organise the following marks in a class assessment, in a tabular form. ](i) Which number is the highest? (ii) Which number is the lowest? (iii) What is the range of the data? (iv) Find the arithmetic mean.

Which of the following relation is true in the highest value,the lowest value and the range of observations?

The mean of four number is 37. The mean of the smallest three of them is 34. If the range of the data is 15, what is the mean of the largest three ?

The histogram given below shows the number of literate females iin the age group of 10 to 40 years. Study the histogram carefully and answer the questions that follow. (i) Write the classes, assuming that all the classes are of equal width. (ii) What is the class width? (iii) In which age group are the literate females the least? (iv) In which age group is the number of literate females the highest?

Which of the following numbers are prime numbers: 179 (ii) 117 (iii) 139