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Evaluate 132^2 − 90^2 using an arithmetic identity.
Correct answer(s):
- 9324
Find the sum of the arithmetic sequence 29, 33, 37, …, 133.
Correct answer(s):
- 2187
What is the units digit of 4^495?
Correct answer(s):
- 4
Calculate the number of trailing zeros in 210!.
Correct answer(s):
- 51
Find the number of positive divisors of 270.
Correct answer(s):
- 16
Find the remainder when 13^39 is divided by 17.
Correct answer(s):
- 4
Find the LCM of 23, 36, and 8.
Correct answer(s):
- 1656
Determine the GCD of 339 and 118 without using prime factor tables.
Correct answer(s):
- 1
Find 5% of 572.
Correct answer(s):
- 143/5
Reduce the fraction 18/90 to lowest terms.
Correct answer(s):
- 1/5
What is the remainder when 3996 is divided by 12?
Correct answer(s):
- 0
Evaluate 144^2 − 90^2 using an arithmetic identity.
Correct answer(s):
- 12636
Find the sum of the arithmetic sequence 44, 50, 56, …, 248.
Correct answer(s):
- 5110
What is the units digit of 12^436?
Correct answer(s):
- 6
Calculate the number of trailing zeros in 160!.
Correct answer(s):
- 39
Find the number of positive divisors of 96.
Correct answer(s):
- 12
Find the remainder when 4^92 is divided by 7.
Correct answer(s):
- 2
Find the LCM of 11, 14, and 35.
Correct answer(s):
- 770
Determine the GCD of 224 and 493 without using prime factor tables.
Correct answer(s):
- 1
Find 20% of 112.
Correct answer(s):
- 112/5