# Tag archives: puzzle

## Physics World at 25: Puzzle 3

**By Louise Mayor**

Have you got what it takes to crack the third conundrum in the Physics World at 25 Puzzle? You can catch up on the previous two instalments here. #PW25puzzle

You are trying to find a phrase with the pattern 3, 6, 2, 8, 8. The puzzle answer is the six-letter word. We hope you enjoy the joke.

QIGC-YLKQDQRIKR INTPRDLKQ DKYGTSDKA IWYBPKAI PKS YLOOIGPRDLK ICCIYRQ

QDHA-EJSDPWRSEKJ

RKPPDRSEKJ SK LDJQESY-ATJRSEKJWH WMMPKXEIWSEKJQ AKP IWJY-DHDRSPKJ QYQSDIQ

IMJQHN OPTPY JF PVY YDYEPMJH ITO WX T OPJEVTOPAE GYPVJN

## Physics World at 25: Puzzle 2

**By Louise Mayor**

Welcome to the second instalment of the Physics World at 25 Puzzle. The first puzzle was released last week and your second challenge lies below. #PW25puzzle

Is Schrödinger’s cat alive or dead?

1. Schrödinger’s cat is alive.

2. Schrödinger’s cat is dead.

3. Exactly one of statements 6 and 9 is true.

4. Exactly one of statements 2 and 6 is false.

5. Statements 4, 5 and 10 are all false.

6. Exactly one of statements 1 and 10 is false.

7. Exactly 5 statements are true.

8. Exactly one of statements 3 and 10 is false.

9. Exactly one of statements 6 and 10 is true.

10. Exactly one of statements 1 and 2 is false.

11. Statements 1, 8 and 11 are all false.

Enter your answer as a list, in numerical order, of the number(s) of the statements that are *definitely* true, as a single string with no spaces, such as, for example, 25811.

## Physics World at 25: Puzzle 1

**By Louise Mayor**

This month is the 25th anniversary of *Physics World* – the member magazine of the Institute of Physics – and in addition to a special celebratory issue, we’ve decided to set you a challenge.

In fact, we have teamed up with GCHQ – one of the UK’s three Intelligence Agencies and home to some of the country’s hottest code-breaking talent – to create with us a set of five physics-themed puzzles. The puzzles have been devised by three GCHQ members of staff, who today we still know only as Colin, Nick and Pete. (Thank you, guys!)

Below is Puzzle 1, the first of the five. The rest will be released on successive Tuesdays throughout October on this blog. The first is the easiest – they only get harder from here on in!