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Hi gmatjeet: Consider following no's - 10 234 20 345 30 456 40 567 50 678 60 789 70 89 1 809 12 9 01 23 as you can see the 1st digit can have 9 possibiilties when second digit is 0. So the statement " First digit can be 1-9 that we didn't use in the 3rd slot , so 8 possibilities " is not ...

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A less algebraic approach would be to use the answer choices . The answers represent the percentage of the mixture that will be X. Let's start with C, which says the mixture will be 40% X, 60% Y. Let's say we use 40 of X and 60 of Y, so our total mixture is 40 + 60 = 100. X is 40% ryegrass, giving ...

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maihuna wrote:i.e E, 38

Answer would be D. Because 400/11 is approx 36.44

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For the 2nd question We have two equations here: (s+ 3^1/2)^2 + (t-1)^2=8 ------ 1 and s^2+t^2=4 -------------2 Now expanding equation 1 we have s^2+ 3+2 (3^1/2) s + t^2 +1 -2t =8 => s^2 + 2 (3^1/2) s + t^2 -2t = 4 Now subtracting equation 2 from equation 1, we get 2 (3^1/2)s -2t =0 => 2 (3^1/2)s = ...

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I took a different approach. Since X is a multiple of 5, so we can conclude that either a or b or both (since a & b are integers, a can't take the value of 5^1/2 in which case a^2 would be a multiple of 5) is a multiple of 5. In case of a^2, assuming that 5 appears in the list of factors of 'a' ...

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The last statement does sound a bit ambiguous. One can easily misinterpret it as "the total acquisition cost of the 250 cars", in which case the 1st statement is sufficient. But it actually asks us to find out the total acquisition cost of the cars yet to be sold at the end of the year, in...

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Here statement 1 says that there are exactly two prime factors of y. It doesn't mention whether they are distinct or not. So the possible answers statement 1 are 4,9,25 and 49. 36 can be ruled out because it has 2 distinct prime factors, but a total of 4 prime factors which contradicts statement 1. ...