**Q22.** Q can finish a work in 20 days while P in 15 days. If the work together 4 days, then find the fraction work that is left?

A. |
B. |

C. |
D. |

**Q23.** Nikki is 25% more efficient than Tina. Tina alone can build a craft in 20 days. Find the number of days taken by Nikki to finish the same piece of work?

A. 15 |
B. 17 |

C. 18 |
D. 16 |

**Q24.** Worker P is 50% as efficient as worker Q. Worker R does half of the work done by P and Q together. If R alone does the work in 40 days, then P, Q, and R together can do the work in?

A. 20 days |
B. 25 days |

C. 13 days |
D. 15 days |

**Q25.** A machine A can produce one thousand cars in 8 hours, machine B can produce the same numbers of cars in 10 hours, and machine C can produce them in 12 hours. All the machines started at 9 AM, but machine A is closed at 11 AM, and the remaining machines complete the work. Find the time at which the work will be completed?

A. 1:00 PM |
B. 12:45 PM |

C. 12:25 PM |
D. 11:30 AM |