What power of 10 is one quadrillion?

Answer 1

"Quad" means "four", thus:

• In those countries that use the long scale (based on powers of million) like Europe:

quadrillion = millionfour = (106)4 = 1024

so a quadrillion is 10 to the power of 24.

• In those countries that use the short scale (based on powers of thousand) like USA:

quadrillion = thousandfive = (103)(4+1) = 1015

so a quadrillion is 10 to the power of 15.