Entry ticket to an exhibition ranges from 1p to 31p. You need to provide exact change at the counter. You have 31p coin. In how many parts will u divide 31p so that u will provide the exact change required and carry as less coins as possible?
option
a) 4
b) 5
c) 6
d) 7

• 1,2,4,8,16..... 5 coins
• 14 years agoHelpfull: Yes(55) No(12)
• 1,2,4,8,16..... 5 coins
• 14 years agoHelpfull: Yes(21) No(7)
• 16,8,4,2,1 in power 2 form.. totally its of cost 31p as given
  so carry exact change of 5 coins.
• 14 years agoHelpfull: Yes(11) No(0)
• answer will be 6 coins
• 14 years agoHelpfull: Yes(9) No(37)
• 4coins
  keyword= as less coins
  
  so 3*10/- coin
  1* 1/- coin
  total 4 coins
  (10/- coin has been released)
• 14 years agoHelpfull: Yes(4) No(30)
• for these type of questions always use 2^0+2^1+2^2....formula until no is reached
• 10 years agoHelpfull: Yes(2) No(0)
• 7
• 14 years agoHelpfull: Yes(0) No(26)