Number Theory Problem 43
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Abhishek Kumar
Jul 28th, 2019
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Sanidhya Mittal Aug 18th, 2019
C)0,1,5or6
Hemnak Soni Aug 4th, 2020
C
Divisibility Problem 2
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Abhishek Kumar
May 19th, 2019
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Sanidhya Mittal Aug 18th, 2019
9
Pramit Bandyopadhyay Oct 26th, 2019
None of these
Hemnak Soni Aug 4th, 2020
D. None of these
Permutations Combinations Problem 11
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Abhishek Kumar
Apr 1st, 2019
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Priyangshu Pramanick Apr 2nd, 2019
Answer is (10!)/2...which is same as (a)
Prime Number Problem 21
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Abhishek Kumar
Mar 24th, 2019
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Priyangshu Pramanick Mar 10th, 2019
false for 5 which is greater than 3
Model Answer:
A prime number (>3) can only be of the forms 6k+1 or 6k+5.
Let n=6k+1
But then n+2=6k+3, a composite number divisible by 3
Let n=6k+5
But then n+4=6k+9, a composite number divisible by 3
Thus, the given statement is false.
Abhishek Kumar
Jul 28th, 2019