In a code language • Each vowel is replaced by its position number in alphabet

Question

In a code language:

• Letters are arranged in reverse order

• Each vowel is replaced by its position number in alphabet

If BALLOON → N1515LL1B, find MONDAY

1. A. Y1DN15M (Correct answer)
2. B. M1DN15Y
3. C. Y15DN1M
4. D. M15DN15Y

Correct Answer

Option A — A

Detailed Solution & Explanation

The correct answer is Option A.

Key Points

• Two rules: (1) reverse the letters, (2) replace each vowel by its alphabet position number.
• MONDAY reversed = Y, A, D, N, O, M. Now replace vowels by position (A=1, O=15):
• Y → Y
• A → 1
• D → D
• N → N
• O → 15
• M → M
• Giving Y 1 D N 15 M = Y1DN15M.
• Check with the example: BALLOON → reverse N,O,O,L,L,A,B → replace vowels O=15, A=1 → N,15,15,L,L,1,B = N1515LL1B. ✓ matches the given code.

Exam Tip

• always verify your rule on the worked example the question provides before applying it to the target word.

Additional Information

• Multi-rule coding questions must be applied in the stated order — reversing first and then substituting gives a different result from doing it the other way round.
• Vowel positions worth having ready: A=1, E=5, I=9, O=15, U=21.
• Apply the full rule set to the given worked example before touching the question word; if your rule fails to reproduce the example, it is wrong.