Decimal Numbers quiz

More questions about Decimal Numbers

These visible examples show the question style. LearnClash turns the full topic into ranked duels and spaced repetition.

1. 1 Easy

   What whole number does the decimal 2.6 round to?

   Answer: 3

   Why: Any decimal with a tenths digit of 5 or greater rounds upward to the next integer.

2. 2 Medium

   Until 2001, which major stock exchange traded prices in fractions, not decimals?

   Answer: New York Stock Exchange

   Why: The NYSE quoted in eighths and sixteenths of a dollar until 29 January 2001, when its minimum tick shrank to a penny.

3. 3 Hard

   In standard 64-bit binary floats, 0.1 + 0.2 produces what?

   Answer: $0.30000000000000004$

   Why: Because binary cannot store fractional tenths without repeating, computers accumulate tiny rounding errors in floating-point addition.

4. 4 Easy

   How much must be added to the decimal 0.7 to equal 1?

   Answer: 0.3

   Why: Ten tenths make one whole, so seven tenths requires three more tenths to reach 1.

5. 5 Medium

   A decimal that ends after a finite number of digits is called?

   Answer: Terminating

   Why: A fraction ends like this only when its reduced denominator has no prime factors beyond 2 and 5, as with 3/8 = 0.375.

6. 6 Hard

   What is the repeating part of a recurring decimal called?

   Answer: Repetend

   Why: In 5/12 = 0.41666... only the 6 keeps repeating, and the length of that repeating block is its period.