What is the purpose of a symbol table in lexical

In the following question, select the missing number from the given series. 

64, 72, 45, 109, –16, ? 

Select the number from among the given options that can replace the question mark (?) in the following series.

8, 32, 16, 64, 32, 128, ?

Which of the following numbers will replace the question mark (?) in the given series?

8, 14, ? , 44, 68, 98, 134

Which figure from the given options would replace the question mark (?) if the following figure series were to be continued?

F is the brother of J. E is the sister of D. K is the sister of L. D is the son of L. J is the father of E. How is D related to F?

Select the number from the given options which can come in place of the question mark (?) in the following series. 

14, 29, 59, 119, 239, ?

Find the missing term in the following numbers series

6, 12, 18, 36, 54, 108, ____?

Select the figure that will come next in the following figure series.

Which figure should replace the question mark (?) if the following figure series were to be continued?