- #1
ponjavic
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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:
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?
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?