There are two correct answers to this question:
15 (in the USA and in any countries that use "short scale" naming conventions)
Or
24 (in countries that use "long scale" naming conventions)
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The scales goes as follows:
Value in
Scientific notation
| Short Scale Name |
| Value in numerals
Long Scale Name
10 01oneone
10 31,000thousandthousand
10 61,000,000millionmillion
10 91,000,000,000billionthousand million or milliard
10121,000,000,000,000trillionbillion
10151,000,000,000,000,000quadrillionthousand billion or billiard
10181,000,000,000,000,000,000quintilliontrillion
10211,000,000,000,000,000,000,000sextillionthousand trillion or trilliard
10241,000,000,000,000,000,000,000,000
septillionquadrillion
The two scales are fairly easy to work out:
billion = bi-million = million2 = (106)2 = 1012 = 12 zeros.
Trillion = tri-million = million3 = (106)3 = 1018 = 18 zeros.
Quadrillion = quad-million = million4 = (106)4 = 1024 = 24 zeros
etc.
ie Take the naming idenitifier and raise a million to the power of that.
billion = bi-million = (103)2+1 = 109 = 9 zeros
trillion = tri-million = (103)3+1 = 1012 = 12 zeros
quadrillion = quad-million = (103)4+1 = 1015 = 15 zeros
etc
ie Take the naming identifier, add one and raise a thousand to the power of that.
The naming identifiers are:
bi- (2), tri- (3), quad- (4), quin- (5), sex- (6), sept- (7), oct- (8), non- (9), dec- (10), etc (the prefix is based on latin numbers).
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Fifteen.
150 Quadrillion (A Quadrillion has 15 Zero's)
If, by guadrilion, you mean quadrillion, then the answer is 15. If not, I don't know.
Billion has 9, Trillion has 12, Quadrillion has 15,Quintillion has 18 .
A quadrillion is a 1 followed by 15 zeroes (1,000,000,000,000,000).Therefore, there are 16 digits in a quadrillion.