1 rupee,2 rupee,5 rupee,10 rupee coins avaiable. a guy paid a sum of rupees. every coin used. if sum of no of 5 and 10 coins used is 1 greater than 1 and 2. whats the number of 1 rupee coin used. data suffiency ques
a)sum of coins is multiple of 10
b)sum of 5 and 10 coins is 13

• Can be answered using BOTH statements
  let x be total number of coins
  sum of coins=10x
  Now we have to try multiples of 10...like 20,30,40,50
  on taking total number of coins as 50 i.e. multiple of 10(1st condition), 13 coins are of 5 and 10(2nd conditiion)
  On taking some trials, we get Rs5 coins=12, Rs 10 coins=1
  So, 5*12+10*1=70
  Now we need to arrange remaining 37 coins(50-13=37) is such a way that we must get value 1 less than 70 i.e. 69.
  So, 2*32+1*5=69
  69+1=70
  
  (5*12)+(10*1)=1+(2*32)+(1*5)
  
  Therefore No. of 1 rupee coins=5
• 7 years agoHelpfull: Yes(2) No(2)
• Are you sure that is was 1 greater than 1 and 2??
  If this is not the condition and its just that no. of coins of 5 and 10 are greater than that of 1 and 2 then answer could have been
  1 coins: 3
  2 coins:4
  5 coins: 6
  10 coins:7
  
  cause:
  sum of coins is multiple of 10 => either 10,20,30...
  but it cannot be greater than 20 as no. of coins of 1 and 2 are less than 5 & 10
  => coins(1)+coins(2)=7
  (13+7=20, which is multiple of 10)
  so 3,4,6,7 remain the perfect match here.
• 9 years agoHelpfull: Yes(1) No(6)
• given that,5 and 10 coinssum is13.....ana remaining coin1 and coins 2 are less than 5,10 coins......so,as per question 3,4,6,7is answer
• 9 years agoHelpfull: Yes(0) No(1)
• but guys it is written that sum of no. of 5 and 10 coins is 1 more than no. of 1 and 2 coins. So how it is possible answer???
• 9 years agoHelpfull: Yes(0) No(1)
• 6,7,5,2 may be
• 8 years agoHelpfull: Yes(0) No(1)
• Question can't be answered on the basis of the two statements
  
  Let the number of currency notes of denomination Re 1,Rs 2,and Rs 5 and Rs 10 Be represented by P,Q,R and S respectively. It is given that P+Q
• 8 years agoHelpfull: Yes(0) No(1)
• it is very easy sum, even lkg kid can solve this
  
  these kind of easy ques cannot be asked in IAS exam so it is definitely an elitmus ques.
• 5 years agoHelpfull: Yes(0) No(1)