Which of the fve pillars of Islam would be easiest to fulfill, and which would be the most challenging?

Answer 1

(zakat) giving alms, easiest,
(haj) going to mecca, an ordeal, but a real highlight.

Answer 2

Prayer (Salah), in the sense of worship, is the second pillar of Islam. Prayer is obligatory and must be performed five times a day. These five times are dawn (Fajr), immediately after noon (Dhuhr), mid-afternoon ('Asr), sunset (Maghrib), and early night (Isha'). Ritual cleanliness and ablution are required before prayer, as are clean clothes and location, and the removal of shoes. One may pray individually or communally, at home, outside, virtually any clean place, as well as in a mosque, though the latter is preferred. Special is the Friday noon prayer, called Jum'ah. It, too, is obligatory and is to be done in a mosque, in congregation. It is accompanied by a sermon (Khutbah), and it replaces the normal Dhuhr prayer.

Answer 3

Easiest I suppose would be the the 5 daily prayers.
Most challenging, the Hajj pilgrimage.

Answer 4

Giving alms(zakah) is the easiest...full filling the 5 prayers every day can be quite difficult...especially if you work.

Believing in God is really the easiest....no exertion required.