Question

A light blinks after every 3 seconds another light blinks after every 5 seconds and the third one blinks after every 16 seconds how many times do the blink together half an hour

Answer 1

They blink together in every 4 minutes.
Hence they blink together in half an hour 8 times including starting time.

Answer 2

The logical problems related to the basic mathematics and arithmetic can easily be solved when you are able to analyse the problems and solve it, by putting the most appropriate formulae at the right place.

It helps you to solve the problems very easily, without facing any kind of delays and interruptions in the enhancement of your abilities.

112.5 is the answer.