Question : A, B and C can do a piece of work in 30 days, 45 days and 90 days, respectively. A starts the work and he is assisted by B and C together on every third day. In how many days will the work be completed?

Option 1: 23

Option 2: 24

Option 3: 30

Option 4: $22 \frac{1}{2}$

Question : A, B and C can do a piece of work in 20 days, 30 days and 60 days respectively. If A works daily and on every third day B and C also work with A, then in how many days, will the work be completed?

Option 1: 21

Option 2: 18

Option 3: 12

Option 4: 15

Question : A can do $\frac{2}{5}$ of a work in 6 days and B can do $\frac{2}{3}$ of the same work in 12 days. A and B worked together for 6 days. C alone completed the remaining work in 8 days. A and C, working together, will complete the same work in:

Option 1: 9 days

Option 2: 12 days

Option 3: 10 days

Option 4: 8 days

Question : Sanjay and Rohan can complete a work in 8 days and 12 days, respectively. Starting with Sanjay, they work on alternate days. In how many days will the work be completed?

Option 1: $8 \frac{1}{2}$

Option 2: $9 \frac{1}{2}$

Option 3: $9 \frac{2}{3}$

Option 4: $9 \frac{1}{3}$

Question : A can do work in 12 days and B in 20 days. If they together work on it for 5 days and the remaining work is completed by C in 3 days, then in how many days can C do the same work alone?

Option 1: 10 days

Option 2: 9 days

Option 3: 12 days

Option 4: 15 days