If you had $100k, how much of that would you keep to spend and how much would you invest?

I would pay off whatever debts I had at the time. Right now that's WAY more than enough. The rest would go into savings until I wanted to buy a house.

I would invest it all

If I had zero debt. I'd invest all of it.

I would pay off my car loan, buy a new stove, a generator and a new mattress. The rest would go into a mutual fund.

i would invest all of them !

I'd pay off all my debts and foreseeable bills then put the rest in the bank. Thats' not enough money to change your life forever like a million would but if you're smart with it you can make it last a while, especially if you're working full time on top of that.

I would invest it into three different properties all valued at or below $175,000 with 20% down on each of them. I would then rent out all three properties. I would use the money from the rentals to pay themselves down as quickly as possible and then in the next 15 years I would have 3 full incomes that would assist me in life. Good luck with it!

I would invest all of it and mow grass for food.

I would keep about $90k and invest the rest.

Vanguard Funds have among the lowest fees around (fee you pay for them to manage your money). Contact Vanguard and tell them you need a financial advisor.

I agree with other answers, you should invest it. However, you may want to minimize regret in case there is a sudden market crash. So I suggest you invest it slowly - say $5,000 per month into a diversified index fund such as the Vanguard Total Stock Market Index (VTSAX). That way if the market drops suddenly you won't be screwed. Even though you may lose out on some gains this way, it's best for sanity!

invest 95 per cent in the stock market and money market fund

I will keep according to my need and will invest rest of them in good place.

There could be somewhat different answers for different people, but my general advice would be, if at all possible, for the sake of personal financial security, invest 100% of it.

Do not invest via financial investment advisors, but rather use index stock and bond mutual funds, as they beat the managed investment funds about 70% of the time and will charge your far less in management fees (which come out of your profits anyway).

Invest only in Vanguard index mutual funds as they are the lowest cost investment management company, and the largest in the world.

So as to be able to "sleep at night," follow the advice of Paul Merriman and use his list of Vanguard index funds. He advises on how to split the investments between stocks and bonds. Stocks and bonds counter balance each other. That is, one goes up when the other goes down. Since the stock market prices could be up or down for a year or more, younger people can take the risk of investing more than 60% in stock mutual funds, where as older or more risk adverse people should maybe invest less than 60% in stocks. That is an individual's decision, but since Merriman's advice was written for retirement age people, use the 60/40 split if you are that age, but up the stock percentage if you are younger.

Mr Merriman has a lifetime in financial investing advice, and his advice here is very good, and free!

The following link describes in detail how he arrived at the percentage breakdowns, if you want to understand them a bit.

http://paulmerriman.com/the-ultimate-buy-and-hold-strategy/

At the end of the article is a link to the specific mutual funds that he advises investing in.
"You can also find my specific mutual fund recommendations and my ETF recommendations for implanting this strategy."

Periodically, yearly maybe, re-balance the mix of total dollars invested in stocks vs. bonds, selling one and buying the other, to maintain your original stock-bond percentage split.

I dont need it so its tossed in the investment pile.

I would continue to spend less than I earn.

Invest it all. If you don't like the stock market, consider using it for a down payment on a house.

If you think of a windfall as money to burn, then it runs out very quickly and leaves you with a lifestyle you cannot afford.

I would spend and invest equal amounts. Probably 30,000 each.

20K easily reachable as emer fund, 80K invested. Assuming all debts paid off including house.