Free Practice Question
PS · Problem Solving
605-655
Combinations
Consider a credit card number consisting of 6 digits (ranging from 1 to 9). The first two digits are 15 in that sequence, the third digit must be greater than 5, the fourth digit needs to be a multiple of 3, and the fifth digit is twice the sixth digit. How many unique credit card numbers can be formed?
Answer Choices
Sign in to reveal the correct answerA
36
B
48
C
60
D
90
E
64
Reveal the correct answer
Sign in for free to check your answer and unlock the full explanation.
Track your performance and improve
Get detailed analytics, unlock full explanations, and move up difficulty tiers as you practice.
Explanation
Unlock the full explanation
Create a free account to reveal the correct answer, see the step-by-step explanation, and start tracking your GMAT progress.
Comments
3
Sign in to join the discussion
S
SriMay 4, 2025
good question
Details
Difficulty
605-655
Type
PS
Category