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Question 1 of 10
⏱ 0:30
Easy
What is the greatest common divisor (GCD) of 84 and 126?
Medium
If the LCM of two numbers is 180 and their GCD is 6, and one number is 30, what is the other number?
Easy
Which of the following numbers is irrational?
Medium
The decimal 0.272727... (repeating) can be expressed as a fraction. What is that fraction?
Easy
Which of the following is a perfect cube?
Hard
Find the remainder when 7^100 is divided by 13.
Easy
Express 0.00125 in scientific notation.
Medium
If a number leaves a remainder 3 when divided by 7 and remainder 4 when divided by 5, what is the smallest such positive number?
Easy
Which of the following is NOT a rational number?
Easy
If the sum of digits of a number is divisible by 9, which of the following is true?