Let x be a two-digit number. If the sum of the digits of x is 9 GMAT Problem Solving

Question: Let x be a two-digit number. If the sum of the digits of x is 9, then the sum of the digits of the number (x + 10) is:

1. 1
2. 8
3. 10
4. Either 8 or 10
5. Either 1 or 10

Approach Solution (1)

Approach Solution (2)

Approach Solution (3)

“Let x be a two-digit number. If the sum of the digits of x is 9, then?”- is a topic of the GMAT Quantitative reasoning section of GMAT. This question has been taken from the book “GMAT Official Guide Quantitative Review”. To solve GMAT Problem Solving questions a student must have knowledge about a good amount of qualitative skills. The GMAT Quant topic in the problem-solving part requires calculative mathematical problems that should be solved with proper mathematical knowledge.

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