reasoning Maths Puzzle

How would you Calculate number of bald People in Delhi. (Rough Estimate, Suppose the population of Delhi is 2cr)

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by counting who bought indulekha along with make a list which takes quite long time.i guess it would be a better solution...
4 years agoHelpfull: Yes(0) No(0)

reasoning Other Question

find the time require for a train of length 150 meters traveling at 36 km/hr to cross a person standing on the platform of length 300 meters. There are 2 tanks, one of 5 ltrs. and other of 3 ltrs.
We want to measure 4 ltrs. of water using only these two tanks.
We can not use any other container.
How can it be done ?