Logarithm - General Aptitude

Q1:

If log10 2 = 0.3010, then log2 10 is equal to:

A
699
301

B
1000
301

C 0.3010

D 0.6990

ANS:B -

1000
301

log2 10 = 1 = 1 = 10000 = 1000 .
log10 2 0.3010 3010 301