BrainBashers - Random Puzzles

Puzzle 5

What word comes next in this sequence:

penguin · umbrella · zebra · zip · llama · egg · ?
Choose from:

salt, pen, ark, glass

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Puzzle 6

Using all of the letters A to Z, each once only, complete these common words. There are currently 2 different answers, can you find them both?
ap--e b-a-e bo--d -an-c -ro-e --ell -ra-y bu-c- -o-ra -umb- s-ua- lo--l g-es-

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Puzzle 7

Some months have 30 days, some have 31, but how many have 28 days?

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Puzzle 8

I travelled from London to Glasgow last week at 60 miles per hour, I had filled my petrol tank just before I left, so it was full with 25 gallons.

Unfortunately, my petrol tank sprang a leak immediately, and I only managed to drive 300 miles before I ran out of petrol.

My car does 30 miles per gallon, how fast was I losing petrol through the hole?

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