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N is an even integer. Which of the following options are applicable on
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26 Aug 2024, 01:55
26 Aug 2024, 01:55
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60% (02:36) wrong based on 5 sessions
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N is an even integer. Which of the following options are applicable on the number of N?
A. There will be 8 values of N, if N is square of an integer that lies between 55 and 555, inclusive
B. There will be 15 values of N, if N is square of an integer that lies between 55 and 555, inclusive
C. There will be 16 values of N, if the square of N lies between 55 and 555, inclusive
D. There will be 8 values of N, if the square of N lies between 55 and 555, inclusive
A. There will be 8 values of N, if N is square of an integer that lies between 55 and 555, inclusive
B. There will be 15 values of N, if N is square of an integer that lies between 55 and 555, inclusive
C. There will be 16 values of N, if the square of N lies between 55 and 555, inclusive
D. There will be 8 values of N, if the square of N lies between 55 and 555, inclusive
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Re: N is an even integer. Which of the following options are applicable on
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26 Aug 2024, 07:25
26 Aug 2024, 07:25
1) First let us find N's such that their squares lie in (55,555). Clearly N = {8,10,...,22} (lowest is 8^2 = 64, highest is 22^2 = 484), so N has 8 values and D is correct.
2) Now let's find the reverse, i.e. N is a square of an even integer such that N lies in (55,555). Clearly, it is the opposite of part (1), i.e. N = {8^2, 10^2, ... , 22^2} (because square of an even integer is even), hence N has 8 values and A is correct.
So, answers are A and D.
2) Now let's find the reverse, i.e. N is a square of an even integer such that N lies in (55,555). Clearly, it is the opposite of part (1), i.e. N = {8^2, 10^2, ... , 22^2} (because square of an even integer is even), hence N has 8 values and A is correct.
So, answers are A and D.
Re: N is an even integer. Which of the following options are applicable on
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09 Sep 2024, 09:22
09 Sep 2024, 09:22
why is c not correct considering that 8 negative values of N are also possible
