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03 Jul 2025, 17:51
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"African grey parrots cannot detect colors with wavelengths greater than or equal to 620 nanometers. Can an African grey parrot detect color W?"
Let AGP = African grey parrots
We can translate the question as: "Is W >= 620?"
(1) Color V has a wavelength of 300 nanometers.
This piece of information doesn't bring us any new useful information. Is it sufficient? No, it is not. Eliminate options A and D.
(2) The wavelength of color W is twice that of color V.
This piece of information doesn't bring us any new useful information. Is it sufficient? No, it is not. Eliminate option B.
Statements (1) and (2):
Ok. Know we know the value of V, 300nm, and the relationship with W (W = 2V). We know, then, that W = 600. Is it sufficient? Yes, it is. We know can affirm that No, AGF can not detect color W.
Answer = C.
Let AGP = African grey parrots
We can translate the question as: "Is W >= 620?"
(1) Color V has a wavelength of 300 nanometers.
This piece of information doesn't bring us any new useful information. Is it sufficient? No, it is not. Eliminate options A and D.
(2) The wavelength of color W is twice that of color V.
This piece of information doesn't bring us any new useful information. Is it sufficient? No, it is not. Eliminate option B.
Statements (1) and (2):
Ok. Know we know the value of V, 300nm, and the relationship with W (W = 2V). We know, then, that W = 600. Is it sufficient? Yes, it is. We know can affirm that No, AGF can not detect color W.
Answer = C.
03 Jul 2025, 18:05
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We are given that African parrots can't detect wavelengths greater than or equal to 620 nanometers
S1 - No information about wavelength W, So INSUFFICIENT
S2 - From this statement alone we Can't find wavelength of W, so We can't infer whether African parrots can see Wavelength W or not
S1+S2 - From this we can infer that wavelength of W = 600 nanometers, but we don't know whether African parrots can see wavelengths below (Say 610 or 602 nanometer). As far as we know their viewing range can be between 610 to 619.99 nanometer
Hence Insufficient, So answer is E
S1 - No information about wavelength W, So INSUFFICIENT
S2 - From this statement alone we Can't find wavelength of W, so We can't infer whether African parrots can see Wavelength W or not
S1+S2 - From this we can infer that wavelength of W = 600 nanometers, but we don't know whether African parrots can see wavelengths below (Say 610 or 602 nanometer). As far as we know their viewing range can be between 610 to 619.99 nanometer
Hence Insufficient, So answer is E
03 Jul 2025, 18:48
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Bunuel
The question states that the bird cannot detect wavelength greater than or equal to 620. now in statement 1, we can see that V is given but it does not tell us anything about W so Statement 1 alone is not suffieicient. But in statemrnt B, we can see that it is given that wavelent of W is twice of V. but since alone we cannot find so, Statement 2 alone is not suffieicent. But both statement together can help us find the wavelength and determine if the bird will able to detenct
