Keyword Analysis & Research: why is 0 not a natural number

Keyword Analysis

Keyword	CPC	PCC	Volume	Score	Length of keyword
why is 0 not a natural number	0.6	0.4	6441	70	29
why	0.8	0.9	335	31	3
is	1.39	0.5	4095	40	2
not	0.83	0.4	4220	48	3
a	0.21	0.2	3489	75	1
natural	1.94	0.7	4992	64	7
number	0.34	0.4	1444	58	6

Keyword	CPC	PCC	Volume	Score
why is 0 not a natural number	0.99	0.4	5467	54
the number 0 is a natural number	1.89	0.1	9621	17
why zero is not a natural number	0.53	0.2	231	81
is 0 is natural number	1.29	0.4	7672	65
does natural number include 0	1.39	0.8	6373	15
is 0 a whole number or natural number	0.81	0.8	8625	24
is 0 a whole number natural number or integer	1.73	0.3	5752	6