Quantitative Aptitude - Arithmetic Ability Questions

∆XYZ is right angled at Y. If tanX = 15/8, then what is the value of sinZ ?

A, B and C can work together for Rs. 550/- A and B together are to do 7/11 of the work. The share of C should be?

What is the average of first 19 odd numbers?

If R019 is divisible by 11, find the value of the smallest natural number R?

The difference between Peter and Preeti's ages is 5 years. When they married each other 35 years ago, 4 times Peter's age was the same as 5 times the age of Preeti. What is the current sum of their ages?

P and Q together can make a door in 12 days. They started the work together but after 8 days P left the work. The remaining work is completed by Q alone in 7 more days. In how many days can P alone complete the entire work?

If PA and PB are tangents to the circle with centre O such that ∠APB=50°, then the ∠OAB=

If PA and PB are two tangents to a circle with centre O such that ∡APB = 80°. Then ∡AOP =