Multiple Choice Questions.( MCQ’s )
- Two numbers are said to be co-prime if they do not have a common factor other than _________.
a) 1 b) 0 c) 2 d) 3
- A number which divides a given number exactly is called a _________ of the given number. a) Dividend b) Divisor c) Remainder d) Factor
- There are an infinite number of ____________ of a given number. a) Divisions b) Additions c) Multiples d) Subtractions
- Factors of 36 are: _________________. a) 1, 2, 3, 4, 6, 9, 12, 18 and 36 b) 0, 1, 2, 4, 5, 7, 21 c) 1, 3, 5, 7, 9, 11, and 21 d) 0, 2, 4, 6, 8, 10 and 12
- Except 2, all other prime numbers are _________. a) Even b) Odd c) Natural d) Whole
- A number is composite if it has at least one factor other than _______ and itself.a) 2 b) 0 c) 1 d) 3
- . A number is divisible by 3, if the sum of its digits is a multiple of _______. a) 2 b) 1 c) 0 d) 3
- All the factors of 15 are____________. a) 1, 3, 5, and 15 b) 0, 1, 3, 5, and 15 c) 0, 1, 3, 4, and 15 d) 1, 3, 4, 5, and 15
- A factorization is prime, if all the factors are ___________. a) Odd b) Even c) Prime d) Whole
- The greatest four-digit number is ____________. a) 9991 b) 9999 c) 9990 d) 1000
- The LCM of two or more given numbers is the _________ of their common multiplies. a) Lowest b) Highest c) Smallest d) Greatest
- . Pairs of prime numbers which differ by 2 are called _________. a) Co-prime b) Composite c) Prime d) Twin-primesAnswers
- (a) 2. (d) 3.( c) 4. (a) 5.(b) 6. (c) 7. (d) 8. (a) 9.(c) 10. (b) 11. (a) 12. (d)