50) There are 10 stepping stones numbered 1 to 10 as shown. A fly jumps from the first stone as follows: every minute it jumps to the 4th stone from where it started - that is from 1st it will go to 5th and from 5th it would go to 9th, from 9th to 3rd. Where would the fly reach at the 60th minute?
1
2
3
4
5
6
7
8
9
10

a) 3
b) 5
c) 1
d) 9

• Ans: 1
  Thought Process:
  This is how the stones are arranged 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5....(you may imagine them to be in a circle!)
  Find nth term of A.P. with common difference=4
  Observe that in 1 min fly goes to the 2nd stone, in 2 min it gets to the 3rd stone and so on. So, in 60 mins it will get to the 61st stone.
  Find the 61st term of the series. (t->61)=1+60*4=241th stone. Now, since the stones are arranged in cyclic fashion,so we must find the 241 mod 10 (because there are 10 stones!) = 1
• 11 years agoHelpfull: Yes(25) No(0)
• c) 1 as after every 5 minutes it will reach 1.
• 11 years agoHelpfull: Yes(12) No(0)
• As there is a repeating sequence 1,5,9,3,7,1,5,9... Here the repeating sequence is of 5 terms 1,5,9,3,7 so at 60th minute fly reaches 7th stone.
• 11 years agoHelpfull: Yes(5) No(2)
• c) 1
  after every 5 minutes it will reach 1
• 11 years agoHelpfull: Yes(4) No(3)
• if the stones are in circular manner then the fly is jumping in such a manner-
  1->5->9->3->7->1...so the pattern is repeting after every 5 minutes...as 60 is divided by 5 so answer is option c
• 11 years agoHelpfull: Yes(3) No(0)
• ITS AN AP WITH A=5 D=4 AND 60TH=5+59*4=241 AND
  D LAST DIGIT OF THE NO WIL B THE ANS. i.e 1
• 11 years agoHelpfull: Yes(0) No(0)
• ans is 1... because for every 10th time v ill be at 1 position so similarly at 60th v ill be at position 1
• 11 years agoHelpfull: Yes(0) No(0)
• Since there is a cycle after every 5 minutes so at exactly at 60th minute the fly would be at 7th stepping stone !!!
• 11 years agoHelpfull: Yes(0) No(0)