## Realated Questions

A red light flashes 3 times per minute and a green light flashes 5 times in two minutes at regular intervals. If both lights start flashing at the same time, how many times do they flash together in each hour?

Let b be a positive integer and a = b

^{2}- b. If b^{3}= 4, then a^{2}- 2a is divisible by:In some code, letters a, b, c, d and e represents numbers 2, 4, 5, 6 and 10. We just don't know which letter represents which number. Consider the following relationships:

i) a + c = e,

ii) b - d = d and

iii) e + a = b

Which statement below is true?