Which command is used to clear the screen

In the given arrangement, how many such numbers are there which are immediately followed by a symbol and immediately preceded by a letter?

In the series given below, count the number of 8s each of which is not preceded by 4 but is followed by either 3 or 6. How many such 8s are there?

Complete the given pattern by choosing the correct alternative.

If all the even numbers are dropped from the above given arrangement then which is the 6th element to the left of the 4th element from the right end?

In the given series, how many vowels are immediately succeeded by a number?

Study the following information carefully and answer the given questions.

What is the sum of all the numbers between '#' and 'N'? 

__________ characteristics is used to compute dynamically the results from Excel data.

Four letter-clusters have been given, out of which three are alike in some manner and one is different. Select the letter-cluster that is different.

Study the arrangement of number and letter carefully and answer the following questions.