1, 4, 10, 19, 31, _
2006-09-01 08:10:24 · 7 answers · asked by Anonymous in Science & Mathematics ➔ Mathematics
46. Add a multiple of 3 each time. 1+3*1=4. 4+3*2=10. 10+3*3=19. 19+3*4=31. 31+3*5=46.
2006-09-01 08:23:15 · answer #1 · answered by Anonymous · 0⤊ 0⤋
46
2006-09-01 16:37:37 · answer #2 · answered by Anonymous · 0⤊ 0⤋
1+(1*3) = 4
4+(2*3)=10
10+(3*3) = 19
19+(4*3) = 31
31+(5*3) = 46
46 is the next number.
2006-09-01 17:12:40 · answer #3 · answered by Shivers 2 · 0⤊ 0⤋
these are the centered triangular numbers: 3n(n-1)/2 + 1
n=6 => next number is 46
2006-09-01 15:29:00 · answer #4 · answered by gjmb1960 7 · 0⤊ 0⤋
1+3=4
4+6=10
10+9=19
19+12=31
31+15=
You get it?
2006-09-01 15:16:47 · answer #5 · answered by Cadair360 3 · 1⤊ 0⤋
46 64 85 109 136
y = 1.5x^2-1.5x+1
2006-09-01 15:15:11 · answer #6 · answered by monarca_08 1 · 0⤊ 0⤋
46 ???
2006-09-01 15:14:11 · answer #7 · answered by Anonymous · 0⤊ 0⤋