i. Which term of the sequence 5, 8, 11.... Is 320? ii. Define arithmetic series. iii. Write down formula for sum of n terms of geometric series. iv. In how many ways the letters of the word PAKPATTAN can be arranged? V. What is multiplicative inverse of [1]? vi. Find two consecutive integers whose sum is 45. vii. viii.. ix. x. What is meant by common difference? What is singular matrix? At what rate Rs. 10,000 double itself in 5 years? If 6 is added to a certain number the result is 13. What is the number?