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What number should appear next in this sequence? 4 5 5 7 14 17 51 55 ?

+2 votes
1,798 views
posted Apr 29, 2015 by Balwinder

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3 Solutions

+2 votes
 
Best answer

4 5 5 7 14 17 51 55 ? ? ?
;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;
1st term=4+1=5
2nd term=5*1=5

3rd=5+2=7
4th=7*2=14

5th=14+3=17
6th=17*3=51

7th=51+4=55
8th=55*4=220

9th=220+5=225
10th=225*5=1125

solution Apr 29, 2015 by Ankit Kamboj
+1 vote

Answer is 220

4+1 = 5
5*1 = 5
5+2 = 7
7 *2 = 14
14 + 3 = 17
17 *3 = 51
51+4 =55
55 * 4 = 220

solution May 1, 2015 by Naga Jyothi
0 votes

225 the third digit is 1 times the second digit therefore the forth digit is 2 added to the third digit. the next 14 is 2 times the previous digit therefore the next one is 3 added to 14. similarly the answer is 225

solution Dec 5, 2016 by Kewal Panesar
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