Find the $LCM(26, 91)$.

If $HCF(a, b) = 8$,$LCM(a, b) = 64$ and $a > b$,then $a = ?$ (Options: $8, 16, 32, 64$)

Find the $g.c.d.$ of the following numbers using Euclid's division algorithm: $117$ and $65$.

Find the $HCF$ and $LCM$ of the following integers by the prime factorization method: $17, 23$ and $29$.

State whether the following rational number has a terminating decimal expansion or not. If it has a terminating decimal expansion,find it: $\frac{15}{1600}$

$L.C.M.(115, 25) = \ldots$