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Determine the GCD of 275 and 452 without using prime factor tables.
Correct answer(s):
- 1
Find 20% of 672.
Correct answer(s):
- 672/5
Reduce the fraction 15/54 to lowest terms.
Correct answer(s):
- 5/18
What is the remainder when 2779 is divided by 9?
Correct answer(s):
- 7
Evaluate 72^2 − 54^2 using an arithmetic identity.
Correct answer(s):
- 2268
Find the sum of the arithmetic sequence 52, 56, 60, …, 120.
Correct answer(s):
- 1548
How many integers from 1 to 70 are coprime to 70?
Correct answer(s):
- 24
What is the units digit of 19^442?
Correct answer(s):
- 1
Calculate the number of trailing zeros in 90!.
Correct answer(s):
- 21
Find the remainder when 6^45 is divided by 9.
Correct answer(s):
- 0
Find the LCM of 36, 33, and 14.
Correct answer(s):
- 2772
Determine the GCD of 299 and 400 without using prime factor tables.
Correct answer(s):
- 1
Find 20% of 214.
Correct answer(s):
- 214/5
Reduce the fraction 18/54 to lowest terms.
Correct answer(s):
- 1/3
What is the remainder when 9274 is divided by 12?
Correct answer(s):
- 10
Find the sum of the arithmetic sequence 1, 4, 7, …, 43.
Correct answer(s):
- 330
How many integers from 1 to 56 are coprime to 56?
Correct answer(s):
- 24
What is the units digit of 12^121?
Correct answer(s):
- 2
Calculate the number of trailing zeros in 80!.
Correct answer(s):
- 19
Find the number of positive divisors of 72.
Correct answer(s):
- 12