Thanks for your replies Brethren.
Matt 24 and the other gospel account basically follow on from Matthew 23. So let us give a short summary.
Amongst all the woes pronounced on the scribes and pharisees we read.
Matt 23:29 Woe unto you, scribes and Pharisees, hypocrites! because ye build the tombs of the prophets, and garnish the sepulchres of the righteous, 30 And say, If we had been in the days of our fathers, we would not have been partakers with them in the blood of the prophets.
31 Wherefore ye be witnesses unto yourselves, that ye are the children of them which killed the prophets.
32 Fill ye up then the measure of your fathers.
33 Ye serpents, ye generation of vipers, how can ye escape the damnation of hell?
They filled up the measure of their fathers by putting to death the Lord of Glory.
34 ¶ Wherefore, behold, I send unto you prophets, and wise men, and scribes: and some of them ye shall kill and crucify; and some of them shall ye scourge in your synagogues, and persecute them from city to city:
35 That upon you may come all the righteous blood shed upon the earth, from the blood of righteous Abel unto the blood of Zacharias son of Barachias, whom ye slew between the temple and the altar.
The judgement for the crimes against Gods people from the beginning would be exacted upon them as they had the scriptures to warn them but they ignored them in the greatest crime against the Lord God. 36 Verily I say unto you, All these things shall come upon this generation.
Here we have two predictions on when this would happen upon you and All these things shall come upon this generation.
Jesus continues showing His love for them, 37 O Jerusalem, Jerusalem, thou that killest the prophets, and stonest them which are sent unto thee, how often would I have gathered thy children together, even as a hen gathereth her chickens under her wings, and ye would not! And then the judgement 38 Behold, your house is left unto you desolate.
The disciples listening to this would know exactly what this meant as their house was desolated by the Babylonians. In his Brief History of Jerusalem, Josephus mentions two desolations, the first by the Babylonians the second by the Romans.
Jesus and the disciples left the temple and disciples were taken aback by the comment that the temple and Jerusalem would be left desolate. Wow, how could this be? Look at these great stones.
Matthew 24:2 And Jesus said unto them, See ye not all these things? verily I say unto you, There shall not be left here one stone upon another, that shall not be thrown down. The desolation described.
3 And as he sat upon the mount of Olives, the disciples came unto him privately, saying, Tell us, when shall these things be? and what shall be the sign of thy coming, and of the end of the world?
4 ¶ And Jesus answered and said unto them, Take heed that no man deceive you.
Mark tells us that it was Peter, James, John and Andrew who asked him privately, Mark 13:4 Tell us, when shall these things be? and what shall be the sign when all these things shall be fulfilled? Matthew adds another question which was off topic as we would say on here.
Jesus had already given and answer to the first question, "upon you and All these things shall come upon this generation." He repeats it Matthew 24:34 Verily I say unto you, This generation shall not pass, till all these things be fulfilled.
The sign: Luke 21;20 ¶ And when ye shall see Jerusalem compassed with armies, then know that the desolation thereof is nigh.
In Matthew 24:36 Jesus answers the off topic question begining with the word "But" signifying a change of topic . But of that day and hour knoweth no man, no, not the angels of heaven, but my Father only. 37 But as the days of Noe were, so shall also the coming of the Son of man be.38 For as in the days that were before the flood they were eating and drinking, marrying and giving in marriage, until the day that Noe entered into the ark,
39 And knew not until the flood came, and took them all away; so shall also the coming of the Son of man be.
Not sure what any of that is to do with anything.