Subject
Quantitative Aptitude
Topic
Number
If a and b are integers such that a+b=5, which of the following must be true?I. The product of a and b is odd.II. If a is odd then b must be even.III. If a is negative, then b must be positive.
If a and b are integers such that a+b=5, which of the following must be true?I. The product of a and b is odd.II. If a is odd then b must be even.III. If a is negative, then b must be positive.
ক)
I onlyখ)
II onlyগ)
I and II onlyঘ)
II and III onlyঙ)
I, II and IIIExplanation
*এটি সবসময় true নয়। উদাহরণস্বরূপ, a=2 এবং b=3 হলে তাদের product even হবে। *এটি সবসময় true। কারণ যোগফল 5 (odd), তাই একটি odd এবং একটি even সংখ্যা থাকতে হবে। *এটি সবসময় true। কারণ যোগফল 5 (positive), তাই যদি একটি negative হয়, অন্যটি অবশ্যই positive হবে এবং তার absolute value বড় হবে। *সুতরাং, II এবং III উভয়ই সবসময় true। *তাই সঠিক উত্তর হল (D) II and III only।Related questions
The average of four consecutive odd positive integers is alwaysIf n and p are both odd numbers, which of the following must be an even number?If x is not a negative number, what is the maximum possible value of 2-3x?If x and y are both odd integers, which of the following numbers must be an even integer?If m is an even integer and n is an odd integer and both are positive numbers, which of the following must be even?If x and y are positive odd integers and z is an even integer, which one of the following statements cannot be true?If x is a positive even number, then each of the following is odd except:If x is an odd integer, in which of the following equations must y be an even integer?I. xy=5 II. x+2y=11 III. 2x+y=12