If $$ 5^{5x+1}=1 $$, then x equals

Which of the following is largest fraction amongst $$ {5\over8}$$, $$ {3\over7}$$, $$ {2\over9}$$,  $$ {4\over5}$$?

Which of the following is equal to 1.41 × 10⁶ ?

If the differernce between the reciprocal of a positive proper fraction and fraction itself be$$17\over42$$, then the fraction is:

Find the least number which when subtracted from 10.000327 is a perfect square.

Let p, q and r be the fraction such that p<q<r. If r is divided by p, the result is 5/2, which exceeds q by 7/4. If $$p+q+r=1{11\over12} $$ then what is the value of (r-p)?

Simplify $$ {^3\sqrt {{4} {12\over {125}}}}$$.

Solve it 0.002 × 0.5=?