Can you build 2 crosses using 7 parts? #shorts

You have 30 matchsticks.You want to build a triangle with those matchsticks.The number of different triangles can you build is

If 10 masons working 7 h daily can build 28 water tanks in 16 days, then how many days will 12 masons working 6 h daily take to build 36 water tanks?

How can you make a building sound proof ?

Select the most appropriate option that can be used as a one-word substitute for the given group of words. A large building or group of buildings used to house soldiers