If m is the tens digit of the sum of the two-digit | GMAT | Quant | NP | Hard | OG

Posted by Payal Tandon | Jul 31, 2024 | GMAT OG Solutions, GMAT Preparation, Quant OG Solutions

A < 1 min read

Question

If m is the tens digit of the sum of the two-digit positive integers kr and ms, where k,m, r and s are digits of the integers, which of the following must be true?

Solution : If m is the tens digit of the sum of the two-digit …

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Question Attributes

Source: Official Mock
Difficulty Level: Hard – 43% accuracy
Question Type: Number Properties

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Summary – If m is the tens digit of the sum of the two-digit . . .

To master Number Properties questions, adhere to the following steps:

Thoroughly understand the given information by actively translating and drawing correct approaches and strategies.
Simplify and do mathematical processing as required.

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Payal Tandon

Payal Tandon, co-founder and COO of e-GMAT, has revolutionized GMAT preparation through her innovative, process-driven teaching methodology that has helped over 50,000 students achieve their dream scores since 2010. From the very beginning, Payal laid the foundation of e-GMAT's success by instilling a process-driven approach to GMAT preparation, becoming a Six Sigma aficionado who believes in "doing things right the first time. Her quantifiable impact speaks for itself: on GMAT Club—the largest online GMAT forum—she is ranked as the #1 rated GMAT expert globally, with e-GMAT maintaining over 1,800 reviews and Payal sustaining a 4.8/5 instructor rating as of 2024-25. Payal holds a Bachelor's degree in Chemical Engineering from the prestigious BITS Pilani and brings analytical rigor from her engineering career at Honeywell, where her experience managing complex projects—including multi-million dollar NASA programs—instilled the systematic precision she now applies to GMAT instruction. Her GMAT expertise spans across all sections of the test, with particular specialization in verbal sections where she pioneered her signature "pre-thinking strategy" for Critical Reasoning, while also introducing a novel framework of six core "process skills" for Quantitative reasoning and innovative approaches for the new Data Insights section that help students systematically tackle problems rather than relying on brute-force repetition. Passionate about education, Payal left her lucrative engineering career to pursue her vision of making quality GMAT preparation accessible to all, believing that students should "give 200% or don't take on the task at all"—a philosophy that permeates every aspect of her teaching. Her success metrics speak volumes: e-GMAT delivers more 700+ scores than any other prep provider, with students consistently crediting her strategies for dramatic score improvements. She has authored over 2,000 GMAT practice questions, conducted 1,000+ hours of webinars, and regularly contributes strategic articles to the e-GMAT blog.