Events & Promotions
|
|
GMAT Club Daily Prep
Thank you for using the timer - this advanced tool can estimate your performance and suggest more practice questions. We have subscribed you to Daily Prep Questions via email.
Customized
for You
Track
Your Progress
Practice
Pays
Not interested in getting valuable practice questions and articles delivered to your email? No problem, unsubscribe here.
Aug 2610:00 AM EDT
-11:59 PM EDT
Save up to $1,000 on select GMAT prep now. This Fall, achieve your most ambitious goals with millions of student success stories behind you.
Aug 2710:00 AM EDT
-11:00 AM EDT
We’ve worked incredibly hard to build TTP into the best test prep experience possible, and it would mean a lot to us to win Newsweek’s 2026 Readers’ Choice Award for Best Test Prep. If TTP has helped you, we’d be incredibly grateful for your vote.
Sep 0609:30 AM EDT
-12:30 PM EST
Top scores are possible when you enroll in a powerful EA course, taught live online + 6 months access to TTP OnDemand video courses included! Perfect class schedule and easy course access for working professionals. Class starts Sept. 6, 9:30am-12:30pm EST
Sep 0907:00 AM PDT
-10:00 AM PDT
Meet AdComs and explore top Master’s programs - MiM, MiF, MSc, MSBA and more. - Application Fee Waivers - Free 1-Week of GMAT Club Tests: - Master's Application Toolkit - Grand Prize Giveaway
Sep 1507:00 PM EDT
-09:00 PM EST
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Sept. 15, 2026 - Nov. 15, 2027, 7:00pm-9:00pm EST
Sep 2108:00 PM EDT
-10:00 PM EDT
Elite scores are possible when you enroll in a powerful GMAT course, taught live online + 6 months access to TTP OnDemand video courses included! Class starts Tues/Thurs Oct. 13, 2026 - Jan. 7, 2027, 8:00pm-10:00pm EST
Hi Everyone,
Although GMAT doesn't test your ability to perform complicated calculations, it would be beneficial to know some calculation tricks that would save you some time.
Trick 7: Rapidly Square Any Number Ending in 5
Multiply the tens digit by the next whole number then affix the number 25
\(65^2: 6*7=42 ==> 'affix' 25 ==> 4225\)
Trick 8: Rapidly Multiply Any Two-Digit Number by 11
Write the number leaving some space between the two digits, then insert the sum of the number's two digit in between.
24*11 ==> 2 ? 4 ==> 2+4=6 ==> 264
Trick 9: Rapidly Multiply by 25 (or 0.25, 2.5, 250, etc.)
Divide the number by 4 and affix or insert Zeroes or decimal points
Example: 28*25 ==> 28/4 = 7 ==> 700 (add 2 Zeroes)
Trick 10: Rapidly Divide by 25 (or 0.25, 2.5, 250, etc.)
Remove Zeroes or decimal points then multiply the number by 4
Example: 700/25 ==> 7/25 ==> 7*4=28
Trick 24: Rapidly Square Any Two-Digit Number ending in 1
\(21^2 \\
==> 20^2=400\\
==> Add: 20+21=41\\
==> Add: 400+41= 441\\
==> 21^2 = 441\)
Trick 59: Rapidly Multiply Any Three-Digit Number by 11 (advanced variation of trick 8)
Write the number leaving some space between the two digits, then insert the summations of the numbers in between (summations of 2 digits everytime; as shown below).
Example:
342*11=??
342*11= 3--2 (write the first & the last number "3"& "2")
342*11=3-62 (the sum of 4+2)
342*11=3762 (the sum of 3+4)
Source: Rapid Math Tricks & Tips. EDWARD H. JULIUS
Although GMAT doesn't test your ability to perform complicated calculations, it would be beneficial to know some calculation tricks that would save you some time.
Trick 7: Rapidly Square Any Number Ending in 5
Multiply the tens digit by the next whole number then affix the number 25
\(65^2: 6*7=42 ==> 'affix' 25 ==> 4225\)
Trick 8: Rapidly Multiply Any Two-Digit Number by 11
Write the number leaving some space between the two digits, then insert the sum of the number's two digit in between.
24*11 ==> 2 ? 4 ==> 2+4=6 ==> 264
Trick 9: Rapidly Multiply by 25 (or 0.25, 2.5, 250, etc.)
Divide the number by 4 and affix or insert Zeroes or decimal points
Example: 28*25 ==> 28/4 = 7 ==> 700 (add 2 Zeroes)
Trick 10: Rapidly Divide by 25 (or 0.25, 2.5, 250, etc.)
Remove Zeroes or decimal points then multiply the number by 4
Example: 700/25 ==> 7/25 ==> 7*4=28
Trick 24: Rapidly Square Any Two-Digit Number ending in 1
\(21^2 \\
==> 20^2=400\\
==> Add: 20+21=41\\
==> Add: 400+41= 441\\
==> 21^2 = 441\)
Trick 59: Rapidly Multiply Any Three-Digit Number by 11 (advanced variation of trick 8)
Write the number leaving some space between the two digits, then insert the summations of the numbers in between (summations of 2 digits everytime; as shown below).
Example:
342*11=??
342*11= 3--2 (write the first & the last number "3"& "2")
342*11=3-62 (the sum of 4+2)
342*11=3762 (the sum of 3+4)
Source: Rapid Math Tricks & Tips. EDWARD H. JULIUS
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block below for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
23 Oct 2017, 01:47
Kudos
Bookmarks
NDND
Joined: 26 Sep 2017
Last visit: 13 Feb 2020
Posts: 98
Own Kudos:
Given Kudos: 655
Status:Enjoying the Journey
Affiliations: ND
Schools: Rotman '21
WE:Marketing (Consulting)
01 Nov 2017, 07:43
Kudos
Bookmarks
Updated with Tricks 9 & 10
Archived Topic
Hi there,
This topic has been closed and archived due to inactivity or violation of community quality standards. No more replies are possible here.
Where to now? Join ongoing discussions on thousands of quality questions in our Quantitative Questions Forum
Still interested in this question? Check out the "Best Topics" block above for a better discussion on this exact question, as well as several more related questions.
Thank you for understanding, and happy exploring!
