I've applied two similar strategies to Switcheroo. Analyzing the small prizes if there's a 1 or 9 as one of the blocks and you know none of the prizes are less than $20 or more than $90, that gives you a clue as to which block goes in the car price. Even if the 5 blocks are more middle of the road numbers, it's better to try pricing the 4 small prizes and save the car for last, because it's more likely a person could guess the first digit in the price of a two digit prize, than the 4th digit in a 5 digit car price. Finally, if after the first 30 seconds if you have 3 right, I would leave the prices alone and not opt for another 30 seconds. Getting 60% right on the first try is very difficult, and unless you sell cars, ice cream makers, or bottle openers for a living, odds are you will have less right by switching the blocks with the second 30 seconds.