Numbers and arithmetic trivia

75 Numbers and arithmetic trivia questions, no sign-in. Review your misses in the LoreUp app.

• Multiplying the numerator and denominator of a fraction by the same nonzero number leaves the size it represents unchanged.Numbers and arithmetic
• A fraction in lowest terms has a terminating decimal exactly when its denominator's prime factors are only 2 and 5.Numbers and arithmetic
• The sum of two irrational numbers is again irrational.Numbers and arithmetic
• The number 1 is a multiple of every whole number.Numbers and arithmetic
• The factorial of zero, written 0!, is defined to be 1.Numbers and arithmetic
• The largest divisor of a whole number is the number itself.Numbers and arithmetic
• Dividing any number by 1 gives back that same number.Numbers and arithmetic
• The whole numbers from 1 to 100 contain as many even numbers as odd numbers.Numbers and arithmetic
• What is the remainder when 17 is divided by 5?Numbers and arithmetic
• Using each of the digit cards 3, 5, and 8 exactly once, what is the largest three-digit number?Numbers and arithmetic
• How many minutes are there in 1 hour and 15 minutes?Numbers and arithmetic
• How is the decimal 0.5 written as a percentage?Numbers and arithmetic
• When one positive integer is divided by another, the remainder is smaller than the divisor.Numbers and arithmetic
• Multiplying any number by zero gives zero.Numbers and arithmetic
• How do 2/3 and 3/4 compare?Numbers and arithmetic
• How do −2 and −5 compare?Numbers and arithmetic
• Which expression has the same value as 3 × (4 + 2)?Numbers and arithmetic
• Which situation has a total equal to 4 × 3?Numbers and arithmetic
• 45 minutes is what fraction of an hour?Numbers and arithmetic
• An item costs 9,000 won in Korea after a 10 percent discount. What was the original price?Numbers and arithmetic
• What is the relationship called between two numbers such as 6 and 35 that share no divisor except 1?Numbers and arithmetic
• Which of the odd numbers from 21 to 27 is prime?Numbers and arithmetic
• How many multiples of 4 are there among the whole numbers from 1 to 20?Numbers and arithmetic
• A base-10 integer ending in 0, 2, 4, 6, or 8 is even.Numbers and arithmetic
• Multiplying an odd number by an odd number gives an odd result.Numbers and arithmetic
• What is 2 raised to the fifth power?Numbers and arithmetic
• Ten thousand multiplied by ten thousand equals which number?Numbers and arithmetic
• The number 1 does not count as a prime.Numbers and arithmetic
• How many divisors does 12 have in all?Numbers and arithmetic
• What are numbers such as 1, 3, 6, 10 and 15, built by stacking dots one longer row at a time, called?Numbers and arithmetic
• Zero counts as an even number.Numbers and arithmetic
• Multiplying a negative number by another negative number gives a negative result.Numbers and arithmetic
• Internet cryptography leans on the fact that multiplying two large primes is easy while factoring the product back apart is hard.Numbers and arithmetic
• Written as a fraction, what is the decimal 0.25?Numbers and arithmetic
• What is the least common multiple of 4 and 6?Numbers and arithmetic
• Roman numerals include a separate symbol for zero.Numbers and arithmetic
• Multiplying two numbers gives the same result whichever order you take them in.Numbers and arithmetic
• If the digits of a number add up to a multiple of 3, the number itself is a multiple of 3.Numbers and arithmetic
• Which ancient method crosses out multiples of 2, then of 3, and so on until only primes are left?Numbers and arithmetic
• Written in base 2, what does the decimal number 8 become?Numbers and arithmetic
• What is the name of the value near 1.618, long regarded as a beautiful proportion?Numbers and arithmetic
• Adding an odd number to an even number gives an odd number.Numbers and arithmetic
• Any number can be divided by zero.Numbers and arithmetic
• Which number base do we use for everyday counting?Numbers and arithmetic
• There are only finitely many primes, so a largest prime exists.Numbers and arithmetic
• The decimal 0.999…, with nines running on forever, is equal to 1.Numbers and arithmetic
• Two is the only even prime number.Numbers and arithmetic
• What number does the Roman numeral X stand for?Numbers and arithmetic
• Which number is closest to a circle's circumference divided by its diameter?Numbers and arithmetic
• The golden ratio is roughly 3.14.Numbers and arithmetic
• Subtracting a number from itself leaves 0.Numbers and arithmetic
• Subtracting an odd number from an even number leaves an even result.Numbers and arithmetic
• A number that can be written as a repeating decimal is rational.Numbers and arithmetic
• The least common multiple of two odd numbers is even.Numbers and arithmetic
• The sum of two odd numbers is even.Numbers and arithmetic
• What is 4.27 rounded up to one decimal place?Numbers and arithmetic
• What is the largest digit that can appear in one place in base 8?Numbers and arithmetic
• What is the decimal 0.375 as a fraction in lowest terms?Numbers and arithmetic
• Every integer is a rational number.Numbers and arithmetic
• Division gives the same result no matter how three numbers are grouped.Numbers and arithmetic