Question
Find the value of the expression: 40 + 5 – 7 ×
[16 + 9 – 3 × (27 – 13)]Solution
ATQ,
40 + 5 – 7 × [16 + 9 – 3 × (27 – 13)]
= 45 – 7 × [25 – 3 × (14)]
= 45 – 7 × (25 – 42)
= 45 – 7 × (-17)
= 45 – (-119)
= 45 + 119
= 164
A thief steals a bike at 12:30p.m. and drives it at 48km/h. But the theft is discovered after half an hour. The bike owner starts to chase him on anoth...
What % of a day is 30 minutes ?
Working together A and B can do a job in 40 days, B and C in 36 days and all three together in 24 days. In how many days can B alone do the job?
A, B and C can do a work in 8, 16 and 24 days respectively. They all begin together. A continues to work till it is finished, C leaving off 2 days and B...
P and Q can complete a project in 15 days and 10 days, respectively. They started doing the work together, but after 2 days, Q had to leave and P alone...
15 male employees or 20 female employees of a company can complete a project in 26 days. How long will 30 male employees and 12 female employees togethe...
A can complete 25% of the work in 4 days, B can complete 50% of the same work in 12 days and C can complete the same work in 32 days. They staned worki...
A can complete a certain work in 30 days. B is 25% more efficient than A and C is 20% more efficient than B. They all worked together for 3 days. B alon...
A man can do a piece of work in 30 hours. If he works with his son then the same piece of work is finished in 20 hours. If the son works alone he can do...
Anu is four times as good as Binni in completing a task. Together they finish the same task in 7 hours. In how many hours will Anu alone complete the task?
Relevant for Exams:
