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Maths Puzzle
HR Interview
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3,6,5,7,8,11,15,?
Read Solution (Total 4)
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- answer is 22
Working from left to right, add numbers first two together, and subtract 4, to give the next value along. - 12 years agoHelpfull: Yes(19) No(7)
- Split the sequence into two: 3,5,8,15 and 6,7,11,?
6+1^2=7
7+2^2=11
11+3^2=20
so ans is 20 - 12 years agoHelpfull: Yes(5) No(6)
- 1+5=6,6+7=13,13+9=22 consecitive odd numbers
- 8 years agoHelpfull: Yes(0) No(2)
- if a_-1=0, and a_0=7 so that a_1=3, a_2=6, a_3=5, etc. then a_n = 2*a_(n-1) - a_(n-3) for n>1
- 7 years agoHelpfull: Yes(0) No(0)
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