Coding Decoding NMAT 2023 questions
Directions (1-5): These questions are based on the following five numbers:
245 674 978 887 635
Q1. If we arranged all numbers in ascending order from left end then, the position of how many numbers will remain unchanged?
(a) One
(b) None
(c) Three
(d) Two
(e) More than three
Q2. If we interchanged 1st and 3rd digit of each number within the number then, how many numbers thus formed are even numbers?
(a) None
(b) Three
(c) Two
(d) One
(e) More than three
Q3. If we interchanged 1st and 2nd digit of each number within the number then, which of the following number thus formed is 3rd smallest number?
(a) 245
(b) 674
(c) 978
(d) 887
(e) 635
Q4 If we arranged all digit in all numbers in descending order then, which of the following number thus formed is the smallest number?
(a) 245
(b) 674
(c) 978
(d) 887
(e) 635
Q5. What is the sum of 3rd digit of 2nd number from left end and 2nd digit of 3rd number from right end?
(a) 10
(b) 8
(c) 9
(d) 11
(e) None of these
Solution (1-5):
S1. Ans. (d)
S2. Ans. (e)
S3. Ans. (b)
S4. Ans. (a)
S5. Ans. (d)
Frequently asked questions
What is this number-based coding-decoding set about?
You're given five 3-digit numbers (245, 674, 978, 887, 635) and asked to answer questions after rearranging their digits or the numbers themselves — ascending/descending order, digit swaps, even/odd checks.
Is there a shortcut for digit-interchange questions?
Write all five numbers down and physically swap the specified digit positions for each one before checking the condition (even/odd, smallest/largest) — doing it number-by-number on paper avoids mental-math errors.
How many questions are in this set and are answers given?
Five questions are given, each with five options, and the final answers (d, e, b, a, d) are listed at the end.