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Maths Puzzle
4, 7, 11, 15, 21, ?, ?, ?
Find next three? how?
Read Solution (Total 2)
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- next two numbers will be 25 and 31
series will be
4, 7, 11, 15, 21,25,31
4= 2*1 +2 = 2n + nth prime number
7= 2*2+3
11= 2*3+5
15= 2*4+7
21= 2*5+11
next number will be 2*6+13 = 25 and 2*7+17 =31 - 12 years agoHelpfull: Yes(7) No(1)
- 25,31
4, 7, 11, 15, 21,25,31 - 12 years agoHelpfull: Yes(3) No(1)
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