How do we do HCF and LCM please tell

i will mark for the one who answers the first

pleas

Weak battery is considered to be a part of routine a. inspection b. wear and tear c. maintenance d. check

Which best explains why this triangle is or is not a right triangle ?

What is the sum of the geometric series in which a1 = 7, r = 3, and an = 1,701? hint: cap s sub n equals start fraction a sub one left parenthesis one minus r to the power of n end power right parenthesis over one minus r end fraction comma r ≠ 1, where a1 is the first term and r is the common ratio