Given odd positive integers x, y and z which of the following is not necessarily true?
Answers
Answer:
where is the statement??????????
Answer:
So this is a CAT question
The first statement is
1) x²y²z² is odd
2) 3(x²+y³)z² is even
3)5x + y + z⁴ is odd
4) z² ( x⁴ + y⁴)/2 is even
So the first statement is true here because
The first 3 positive odd integers is 1,3,5
x=1 y=3 z=5
• When you substitute the first statement with the numbers it will be
1 x 9 x 25 = 225
Hence it is true because it is odd
• When you substitute the second statement with the numbers it will be
3(1 + 27)25 when you solve it you get
3+71 x 25
74 x 25
= 1850
It is true because 1850 is an even number
• When you substitute the third statement with the numbers
5 + 3 + 5⁴
8+625 = 633
It is true because 633 is an odd number
•when you substitute the fourth statement with the numbers
5²( 1² + 3⁴ ) / 2
25 ( 1 + 81 ) / 2
25 x 82 / 2
25 x 41
=1025
It is not true as 1025 is not even number Hence the answer is option (4) which is not true