Puzzle 197
Can you make this equation correct by moving exactly one matchstick?

Note: this puzzle is not interactive, and the matchsticks cannot be moved. The matchstick layouts for each digit are:
Puzzle 198
Can you unscramble the letters below to find four cheeses popular in the UK?
c c e d h b h e a e m r s d i h e d i a r r e
Puzzle 199
Training Stars #1all logic puzzles
The first group of trainee astronauts are all sitting around the rectangular table, waiting to start their first day of training.
From the clues given below, can work out where everyone sits?
The seats are numbered clockwise, with Seat 1 next to Seats 2 and 8. Opposite pairs are Seats 1 & 5, 2 & 8, 3 & 7, and 4 & 6.

William is next to Alisa and Nick.
William is across from George.
Amanda is next to Sarah.
Sarah is across from Eric.
Nick is next to Eric.
Sydney is in Seat 4 and sits next to George.
George has a higher seat number than Sydney.
Alisa is not in Seat 2.
Puzzle Copyright © Randall Fine
Puzzle 200
Yesterday I was asked to buy some stamps.
In the land of BrainBashers, stamps are available in denominations of 4p, 5p, 7p, 12p, and 19p (just the five different values).
For three denominations of stamps, I was asked to buy six of each. For the other two denominations. I was asked to buy ten of each.
Unfortunately, I forgot which I was supposed to buy six of, and which to buy ten of!
Luckily I had been given the exact money required to buy the stamps, £3.50, so the shopkeeper was able to work out the stamps I needed.
Which stamps did I have to buy?