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# Maths and Numbers

### Quiz

1. What name is given to a number that fits exactly into a given number, or divides a particular number with no remainder?
2. What name is given to the mathematical study of continuous change?
3. What fraction is often used for everyday calculations of Pi?
4. In number theory, what sort of number is a positive integer that is equal to the sum of its positive divisors, excluding the number itself?

5. What ratio is a ratio between two numbers that equals approximately 1.618?
6. What sequence is a sequence in which each number is the sum of the two preceding ones?
7. What progression is a sequence of numbers such that the difference from any succeeding term to its preceding term remains constant throughout the sequence?
8. What sort of fraction is a fraction that has a numerator that is greater or equal to the denominator?
9. What is another name for a binary digit?
10. What is the answer to any number raised to the power of 0?
11. What way of writing very large numbers was developed by Archimedes where he outlined a system for calculating the number of grains of sand in the universe, which he found to be 1 followed by 63 zeroes?
12. What numbers are numbers that result in a negative number when squared?
13. What sort of logarithm of a number is its logarithm to the base of the mathematical constant 'e'?
14. What value prime number is the same value as the tilt of the Earth's axis?
15. What number is a combination of a real number and an imaginary number?
16. Give the eighteenth letter of the Greek alphabet which is generally used to denote a sum of multiple terms?
17. In mathematics, an exclamation mark stands for what mathematical operation?
18. The sum of the first nine prime numbers up to 23 adds up to what value?
19. Pi is the ratio of circumference of a circle to its what?
20. What is the square root of 2 as a decimal to one decimal place?

1. Factor
2. Calculus
3. 22/7
4. A perfect number
5. The golden ratio
6. The Fibonacci sequence
7. Arithmetic progression
8. Improper fraction
9. A bit
10. 1
11. Scientific notation
12. Imaginary numbers
13. Natural logarithm
14. 23 (the Earth tilts at 23 degrees)
15. Complex number
16. Sigma
17. Factorial
18. 100
19. Diameter
20. 1.4