SAT MATH Question

Test Preparation SAT Preparation
1

<p>How many positive integers less than 1,000 do not have 7 as any digit?
A) 700
B) 728
C) 736
D) 770
E) 819</p>

<p>The answer is (B), but how can i solve this question in 30 seconds? Thank You </p>

2

<p>thank you!</p>

3

<p>Why are there 648 possibilities for 3-digit numbers?</p>

4

<p>Ok. Thanks :)</p>

5

<p>Great trick!</p>