Strings: Level 2 Challenges

     

How many times does the number '7' appear in String a?

1
String a = "1628261829271628239271982027282927827618227261434335242627282928276272728292918972625252728921011514252431524251524152524254253435241534223392028302029382002929102102929101192928101019298281910101010991929121900101010292991010101029920101092929128919010101929928912910101828272663272818182726256352562615624236252377777215252616252541256625421652392029281710000001010929298282781818288272718821827271288182712819889192919818991292191212272726167172762626216163515251.";

Arpit MIshra by Arpit MIshra

Count the total number of letter "F" in the following text:

FINISHED FILES ARE THE RESULT OF YEARS OF SCIENTIFIC STUDY COMBINED WITH THE EXPERIENCE OF YEARS...

This teaser is called "Alzheimer's' eye test".

Vishnu Suresh by Vishnu Suresh

Consider the calculation as follows :

2(X+3)Y+9 \frac{2(X+3)} {Y+9} (where X & Y are variables)

Which of the following represents the correct Reverse Polish notation for that calculation :

  • A 2 X * 3 + Y / 9 +
  • B 2 X 3 + * Y 9 + /
  • C 2 X + 3 * Y 9 + /
Tony Flury by Tony Flury
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