Refer to the following letter, number, symbol series and answer the question.
(Left) H T D 1 9 B $ Y T W N P 8 2 3 @ N 2 L E 4 H (Right)
How many such symbols are there which are immediately preceded by a letter and also immediately followed by a number?
Three wires, A, B and C, of the same length and the same thickness have resistances of 0.5 Ω, 0.2 Ω and 1.0 Ω, respectively. Their resistivities are _______.
In a certain code language, “I like holidays” is written as ‘sf vg tu’; “summer holidays started” is written as ‘nj tu nk’; and “I hate summer” is written as ‘sf io nj’. What is the code for the word “summer” in that language?
