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pqr is a three digit natural number such that pqr = p^3+q^3+r^3. What is the value of r?
a) 0 b) 1 c) 3 d) None of these
Read Solution (Total 4)
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- Any armstrong number will follow the above property.
Like : 153,371 - 11 years agoHelpfull: Yes(11) No(2)
- pqr=153
153=1+125+27
so r=3 - 11 years agoHelpfull: Yes(5) No(3)
- pqr=371
371= 3^3+7^3+1^3= 27+343+1=371
r=1 - 11 years agoHelpfull: Yes(4) No(4)
- it is automorphic no
hence ans is 3
1^+5^3+3^3=153 - 11 years agoHelpfull: Yes(2) No(1)
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