So I'm trying out the test to prepare me for my upcoming cambridge interview, there is one problem I can't understand though this one:(adsbygoogle = window.adsbygoogle || []).push({});

44 Sally is helping her father dig worms for fishing.

"That's exactly enough," he says as she places a worm in his tin.

"How many do you need?" she enquires.

"I use 4 worms on my hook and reckon on having to replace an average of one of these

each time I cast. I cast 12 times an hour. Today I will fish 5 pools spending an hour at

the first 4 and an hour and a half at the fifth. I always discard the worms on my hook

when walking between pools."

How many worms are in the tin?

A 66

B 69

C 81

D 86

E 264

I reckon it is D since:

He passes five pools thus 4*5 worms should be placed on the hook.

He spends a total of 5.5 hours at the pools netting 12*5.5=66 throws --> 66 worms.

66+20=86 worms

It is possible that they mean an hour total on the first four pools in this case:

Passes five pools = 20.

spends 2.5 hours casting = 12*2.5=30 casts --> 30 worms.

20+30=50 worms.

According to the answer sheet the answer is C. It should have something to do with 5 pools since 86-5=81 but what?

**Physics Forums | Science Articles, Homework Help, Discussion**

Join Physics Forums Today!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

The friendliest, high quality science and math community on the planet! Everyone who loves science is here!

# Homework Help: Thinking skills assessment test

**Physics Forums | Science Articles, Homework Help, Discussion**