45, 49, 51 – The Logic is odd numbers excluding PRIME NUMBERS.
Preferences
§
1
2
3
4
5
6
7
8
9
0
-
=
Backspace
Tab
q
w
e
r
t
y
u
i
o
p
[
]
Return
capslock
a
s
d
f
g
h
j
k
l
;
'
\
shift
`
z
x
c
v
b
n
m
,
.
/
shift
English
Deutsch
Español
Français
Italiano
Português
Русский
alt
alt
The pattern is add three and then multiply by three. The next number is 174.
The next three numbers in the sequence are 23, 25, and 27.
Each number is three times the previous number.
The numbers are halving each time, so the next three are 60, 30 and 15.
11, -10, 9
42 123 243
Of course, you can make infinitely many series that start with these numbers. One possibility is that the difference between consecutive numbers inreases 5 at a time (10, 15, 20, etc.).
6, 15, 24, 33, 42, 51, 60
15
-3 0 3 then 6 9 12 15 18 21 and so on ...
14, 15, 14 It is the percentage of prime numbers in each ascending group of 100 numbers.
27, 33, and 39. The pattern adds 6 each time