Read the following passage and solve the questions based on it.
Five friends—Umesh, Vishnu, Xinhua, Yogesh and Zeta collected pebbles on the sea shore. They collected a total of 100 pebbles.
None of them collected less than 10 pebbles each. No two among them collected the same number of pebbles. Following information is given regarding the number of pebbles with each one of them:
(i) Umesh collected the same number of pebbles as Vishnu and Xinhua put together.
(ii) Xinhua collected 3 more pebbles than the cube of an integer.
(iii) The number of pebbles collected by Umesh was the square of an integer.
(iv) The number of pebbles collected by Vishnu was either the square or the cube of an integer.
(v) The number of pebbles collected by Yogesh and Zeta are in the ratio 4 : 3.
What was the number of pebbles collected by Vishnu?