BREAKING: Target Test Prep releases Brand New 2026 On Demand GMAT prep course

Redeem

Target Test Prep · GMAT

Choose how you want to prepare

Learn live with an expert or move at your own pace. Every option includes the complete TTP study system.

★★★★★5.0559 reviews
GMATLiveTeach 7 seats left
Chris Peckover
NEXT LIVE COHORT

Oct 13 to Jan 7, 2027

with Chris Peckover

Schedule
Tue, Thu · 8:00 to 10:00 PM ET
Included
40 live hours + 6 months of GMAT OnDemand
  • Live instruction and real-time questions
  • Class recordings and assigned practice
View class & enroll
Limited cohort · enrollment openTarget Test Prep
EALiveTeach 5 seats left
Logan Thompson
EXECUTIVE ASSESSMENT

Sep 6 to Dec 6, 2026

with Logan Thompson

Schedule
Sun · 9:30 AM to 12:30 PM ET
Included
Live EA class + 6 months of EA OnDemand
  • Expert-led weekly online sessions
  • EA Masterclass access between classes
View EA class & enroll
Limited cohort · enrollment openTarget Test Prep
GMATOnDemand Start anytime
SELF-PACED MASTERCLASS

Target Test Prep GMAT OnDemand

Complete access from day one. Study on your schedule.

130-point score guarantee
$0to start then $127/mo
  • Personalized study plan and analytics
  • Thousands of lessons and practice questions
Start free 5-day trial
Read 559 reviewsTarget Test Prep

Compare the format, schedule, and included access before enrolling. Prices and seat counts shown reflect the supplied offer details.

Number Properties

Expert replies
Post new topic Post Reply
Previous Topic Next Topic
Source: — Problem Solving |
Junior | Next Rank: 30 Posts
Posts: 11
Joined: Sun Jun 07, 2020 2:35 am

Re: Number Properties

by RaghavKhanna » Thu Jun 11, 2020 3:06 am
1! + 2! + 3! + 4! + 5! + 6! + 7! + 8! + 9! + 10! = S

5! = 120 and after this, every number will have 0 in the unit's place.

=> Unit's digits of (S) = Unit's digit of (1!+2!+3!+4!) = Unit's digit of (1+2+6+24) = 3
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY

GMAT/MBA Expert

User avatar
GMAT Instructor
Posts: 8176
Joined: Sat Apr 25, 2015 10:56 amFollowed by: 29 members
Location: Los Angeles, CA
Thanked: 43 times

Re: Number Properties

by Scott@TargetTestPrep » Fri Jun 12, 2020 1:48 pm
swerve wrote: ↑
Wed Jun 10, 2020 3:51 am
 Calculate the units digit of the following expression:

1! + 2! + 3! +4! +5!….. + 10!

A. 1
B. 3
C. 5
D. 7
E. 9

The OA is B

Solution:

Recall that the units digit of n! is 0 if n ≥ 5. Therefore, we only need to calculate the units digit of 1! + 2! + 3! + 4!. Since 1! + 2! + 3! + 4! = 1 + 2 + 6 + 24 = 33, the units digit is 3.

Answer: B

Scott Woodbury-Stewart
Founder and CEO
[email protected]

Image

See why Target Test Prep is rated 5 out of 5 stars on BEAT the GMAT. Read our reviews

ImageImage
Top
Join the discussion
Log in to postLogin with Googleuse password
QUOTE IN REPLY
Post new topic Post Reply
• Page 1 of 1