In each of the following questions, two numbers are given which follow a certain logical or arithmetic relationship. Identify the same pattern and apply it to find the missing number in the second pair. Choose the correct option from the given alternatives.
42175 : 64397 :: 56324 : ?
Show answer & explanation
Correct answer: A
Explanation
42175 : 64397
4 → 6 (+2)
2 → 4 (+2)
1 → 3 (+2)
7 → 9 (+2)
5 → 7 (+2)
That is, 2 is added to each digit.
56324 : ?
5 → 7
6 → 8
3 → 5
2 → 4
4 → 6
⇒ 78546
Correct answer: (a) 78546