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- Video Course
- Video Course Overview
- General GMAT Strategies - 7 videos (free)
- Data Sufficiency - 16 videos (free)
- Arithmetic - 38 videos
- Powers and Roots - 36 videos
- Algebra and Equation Solving - 73 videos
- Word Problems - 48 videos
- Geometry - 42 videos
- Integer Properties - 38 videos
- Statistics - 20 videos
- Counting - 27 videos
- Probability - 23 videos
- Analytical Writing Assessment - 5 videos (free)
- Reading Comprehension - 10 videos (free)
- Critical Reasoning - 38 videos
- Sentence Correction - 70 videos
- Integrated Reasoning - 17 videos

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## Comment on

Multiples of 5## Can you also solve by lining

## Perfect! That's similar to

Perfect! That's similar to the strategy described here: https://www.gmatprepnow.com/module/gmat-word-problems/video/927

## Why is it not necessary to

Thanks a lot and best

## Great question!

Great question!

From the Official Guide for GMAT Review: If x and y are integers and x ≠ 0, then x is a divisor (factor) of y provided that y = xn for some integer n.

In this case, y is also said to be divisible by x or to be a multiple of x.

So, the definition of "multiple" implies that we are dealing with integers only.

## sir why not use ap instead?

## I'm not a big fan of having

I'm not a big fan of having students memorizing too many formulas. I feel that the test-makers can easily exploit some students' tendency to have an overly formulaic approach to GMAT math questions.

Cheers,

Brent