Don’t lose your progress!

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Up to 90+ points GMAT score improvement guarantee

The best guarantee you’ll find

Our Premium and Ultimate plans guarantee up to 90+ points score increase or your money back.

Master each section of the test

Comprehensive GMAT prep

We cover every section of the GMAT with in-depth lessons, 5000+ practice questions and realistic practice tests.

Schedule-free studying

Learn on the go

Study whenever and wherever you want with our iOS and Android mobile apps.

The most effective way to study

Personalized GMAT prep, just for you!

Adaptive learning technology focuses on your academic weaknesses.

Sequences: Consecutive Integers - Arithmetic Sequence

In a sequence of 19 numbers, after the first term, each term is 9 more than the previous term. If the last term in the sequence is 200, what is the first term?
Correct. [[Snippet]] In the given sequence, $$d = 9$$ and $$A_{19} = 200$$. Plug in $$d=9$$, $$n=19$$, and $$A_n = 200$$ into the formula and solve for $$A_1$$: >$$A_n = A_1 + (n - 1)d$$ >$$200 = A_1 + (19 - 1) \times 9$$ >$$200 = A_1 + 18 \times 9$$ >$$200 = A_1 + 162$$ >$$38 = A_1$$
Incorrect. [[Snippet]]
Incorrect. [[Snippet]]
Incorrect. [[Snippet]]
Incorrect. [[Snippet]]
9
10
20
29
38