Below, 10 nine-letter words have been broken into chunks of three letters.

These chunks have been mixed up, no chunk is used twice and all of the chunks are used.

Can you determine the 10 original words?

RBR TIM SAG TEL LIG ENT
HEA DLI BLE WHI HTN FER
CAR AGE ESC ING IND WAT
TIL HAI USH DIF ETA NEW
RLW ALL ERF OPE ENT GHT

How many squares have been placed in the drawing below?

Last week I travelled from London to Leeds, which is a distance of 174 miles.

I started at 9.15am and completed the journey with an average speed of 40 miles per hour.

On the way back, in the evening, I travelled exactly the same route, starting at 5.15pm. The traffic was light and I completed the journey with an average speed of 60 miles per hour.

What was the overall average speed for round trip?

The answer is not 50 mph.

Can you find a five digit number which has no zeros no digit is repeated, where:

The first digit is a prime number.
The second digit is the fifth digit minus the first digit.
The third digit is twice the first digit.
The fourth digit is the third digit plus three.
The fifth digit is the difference between the first digit and the fourth digit.