Study the graph and answer the question that follows. The following bar chart shows the sales volume of Philips bulbs (in thousand) from five different electric shops in a city during two years 2017 and 2018.
What is the average sales volume of Philips bulbs (in numbers) from all the shops for the year 2017?
Refer to the following number and symbol series and answer the question.
Note: The numbers are to be considered as a whole and should not be split into its constituent digits.
Series:
+ 25 @ 36 # 29 37 % 14 – 7
Question:
How many symbols have a prime number as an immediate neighbour on either of its sides?