`(661xx662xx660)/(17)` find R.

(1001xx1002xx1003)/(27) find R.

If a, b, c are three whole numbers then (a+b)+c=a+(b+c) and axx(b+c)=axxb+axxc State the property used in the following statement. 661xx93+661xx7=661xx(93+7)

3/7 xx 7/17

What is the number of significant figures in Avogadro's number (6.0 xx 10^(23)) and Planck's constant (6.62 xx 10^(-34) J s) .

Find the total number of prime factors in 2^(17) xx 6^(31) xx 7^(5) xx 10^(11) xx 11^(10) xx (323)^(23) .

If 29xx48=576,35xx16=90,22xx46=96 , then 42xx17=?