John is of the same age as Mohan. Ram is also of the same age as Mohan. State the Euclid's axiom that illustrates the relative ages of John and Ram.

State whether the following statement is true or false:
Euclid was a well-known student of Thales.

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The total number of propositions in the Elements are:

State whether the following statement is True or False. Justify your answer.
Attempts to prove Euclid's fifth postulate using the other postulates and axioms led to the discovery of several other geometries.

Euclid divided his famous treatise 'The Elements' into $\ldots \ldots \ldots$ chapters.