AI Mentor

Check Your IQ

Free Expert Demo

Try Test

Courses

Dropper NEET Course Dropper JEE Course Class - 12 NEET Course Class - 12 JEE Course Class - 11 NEET Course Class - 11 JEE Course Class - 10 Foundation NEET Course Class - 10 Foundation JEE Course Class - 10 CBSE Course Class - 9 Foundation NEET Course Class - 9 Foundation JEE Course Class -9 CBSE Course Class - 8 CBSE Course Class - 7 CBSE Course Class - 6 CBSE Course

Offline Centres

State true or false:
If a and b are two odd positive integers such that a > b, then one of the two numbers $\frac{(a + b)}{2}$ and $\frac{(a - b)}{2}$ is odd and the other is even.

see full answer

Your Exam Success, Personally Taken Care Of

1:1 expert mentors customize learning to your strength and weaknesses – so you score higher in school , IIT JEE and NEET entrance exams.

An Intiative by Sri Chaitanya

True

False

answer is A.

(Unlock A.I Detailed Solution for FREE)

Best Courses for You

JEE

NEET

Foundation JEE

Foundation NEET

CBSE

Detailed Solution

We have to check whether one of the two numbers

\frac{(a + b)}{2}

and

\frac{(a - b)}{2}

is odd and the other is even, if a and b are two odd positive integers such that a > b.
Let the two consecutive odd positive integers be

4 q + 1

and

4 q + 3

where q is a whole number.
As,

a > b

a = 4 q + 3

and

b = 4 q + 1

.
Hence,

\frac{(a + b)}{2} = \frac{[(4 q + 3) + (4 q + 1)]}{2}

\Rightarrow \frac{(a + b)}{2} = \frac{8 q + 4}{2}

\Rightarrow \frac{(a + b)}{2} = 2 (2 q + 1)

Hence,

2 (2 q + 1)

represents an even number as it is completely divisible by 2.

\frac{(a - b)}{2} = \frac{[(4 q + 3) - (4 q + 1)]}{2}

\Rightarrow \frac{(a - b)}{2} = \frac{2}{2}

\Rightarrow \frac{(a - b)}{2} = 1

Hence, 1 is an odd number.
Therefore, it is true that if a and b are two odd positive integers such that a > b, then one of the two numbers

\frac{(a + b)}{2}

and

\frac{(a - b)}{2}

is odd and the other is even.
Hence, option 1 is correct.

Watch 3-min video & get full concept clarity

courses

No courses found

Result Producing online coaching for JEE/NEET of south India

Largest All India Test Series for JEE/NEET

Best Online Course for IIT JEE

Best Online Course for NEET

Best Online Course for CBSE

Ready to Test Your Skills?

Check your Performance Today with our Free Mock Test used by Toppers!

Take Free Test

Get Expert Academic Guidance – Connect with a Counselor Today!