10 most difficult symbols riddles

The origin of the logo may be traced back to a trip made by the 22-year-old André Citroën to Łódź city, Poland, where he discovered an innovative design for a chevron-shaped gear used in milling. He bought the patent for its application in steel and started his company which initially produced gears.

The French government website states that the white field was the colour of the king, while blue and red were the colours of Paris.

Bowl of Hygieia is one of the symbols of pharmacy, and along with the Rod of Asclepius it is one of the most ancient and important symbols related to medicine in western countries. Hygieia was the Greek goddess of Health hygiene, and the associate, wife, or daughter of Asclepius. Asclepius' symbol is his rod, with a snake twined around it; correspondingly, Hygieia's symbol is a cup or chalice with a snake twined around its stem and poised above it.

So far the Olympic Flame went out 5 times. In 1976 in Montreal the fire went out due to intensive rain. In Athens in 2004 the flame went down on the historical stadium of 1896. During Beijing Games of 2008 it was gone due to "technical issues". During the relay to London in 2012 the flame got extinguished on a boat. On the relay to Sochi in 2013 fire went out at Red Square of Moscow.

The Divine Comedy is composed of 14,233 lines that are divided into three canticas – Inferno (Hell), Purgatorio (Purgatory), and Paradiso (Paradise) – each consisting of 33 cantos . The number "three" is prominent in the work, represented in part by the number of canticas and their lengths. Additionally, the verse scheme used, terza rima, is hendecasyllabic with the lines composing tercets according to the rhyme scheme aba, bcb, cdc, ded,

Following the defeat of the Parliament army at the battle of Worcester in 1651, the future king of England, Charles II Stuart sought hideaway on an oak to save himself from Cromwell's soldiers.

The Springbok is South Africa's national animal. Mostly found in the open grasslands and semi-desert in the western and southern region, the Springbok both grazes and browses. Its population is large, and it is often hunted for its meat and hide.

It is the symbol of Hinduism. It is also an iconic representation of 'Om' also written as 'Aum', the most sacred syllable, symbol, or mantra in Hinduism, that signifies the essence of the ultimate reality, consciousness or Atman. The Om sound is the primordial sound, and is called the Shabda-Brahman (Brahman as sound). It is a syllable that is chanted either independently or before a mantra.

The color blue in many cultures is significant in religious beliefs, brings peace, or is believed to keep the bad spirits away. In Iran, blue is the color of mourning while in the West the something blue bridal tradition represents love

Lemniscate refers not only to the infinity symbol, but also to any geometric shape that is curved like a figure-eight.