If the first and second letters in the word 'COMMUNICATIONS' were interchanged, also the third and the fourth letters, the fifth and sixth letters and so on, which letter would be the tenth letter counting from your right?
AA
BU
CN
DT
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32 ആളുകൾക്ക് ഒരു ജോലി പൂർത്തിയാക്കുവാൻ 15 ദിവസം വേണമെങ്കിൽ 10 ദിവസം കൊണ്ട്
ആ ജോലി പൂർത്തീകരിക്കുവാൻ എത്ര ആളുകൾ വേണം ?
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