PRACTICE QUESTIONS CLASSROOM WING

If $R:S=3:1$ and $S:T=1:5$, then $R:S:T=$ _____.

If $a:b::b:c$, then $a, b, c$ are in _____ proportion.

If $\frac{a}{b}=\frac{c}{d}=\frac{e}{f}=\frac{1}{3}$, then $\frac{5a+3c+7e}{5b+3d+7f}=$ _____.

If $x=2, 7, 11, \dots$ and $y=8, 28, 44, \dots$, then $x$ and $y$ are in _____ proportion.

If $x$ and $y$ are in indirect proportion and $y$ doubles, then $x$ becomes _____.

The ratio obtained when $9:11$ is written with its consequent equal to $99$ is _____.

The sub-duplicate ratio of $64:81$ is _____.

If $40$ men complete a piece of work in $5$ days, then $80$ men can complete the same piece of work in _____ days.