How many such pairs of letters are there in the word 'PARTICLE' (in both forward have as many letters between them in the word as there are in the English and backward directions) which alphabetical order?
AOne
BTwo
CThree
DNone
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Related Questions:
Each of the digits in the number 813924765 is arranged in ascending order from left to right. The position of how many digits will remain unchanged as compared to that in the original number?
Each of the digits in the number 318924765 is arranged in descending order from left to right. The position of how many digits will remain unchanged as compared to that in the original number?
Refer to the following number series and answer the question.
51263865365325695172
How many such numbers are there in the series each of which is immediately preceded by an even number and also immediately followed by an even number?