Multiple & Factors Worksheet-7

Multiple & Factors Worksheet-7

1. Prime factorization of 143 are:

      A. 2×11×13        B. 11×13             C. 2×3×7           D. none of these

2. The greatest number that will divide 137, 182 and 422 leaving a remainder of 2 in each case is:

      A. 15                   B. 12                    C. 21                   D. none of these

3. Four bells ring at intervals of 6,7,8 and 9 seconds respectively. All the bells ring together after ____ seconds.

      A. 504                 B. 516                 C. 508                D. 512

4. The greatest number of 4-digits exactly divisible by 12, 15, 20 and 35 is:

      A. 9,999             B. 9,660             C. 9,832             D. 9,860

5. The least number which when divided by 9, 12, 16, 30 leaves in each case a remainder of 3 is:

      A. 720                 B. 723                 C. 823                D. 750

6. The smallest number which when divided by 20,25,35 and 40 and leaves remainders as of 14, 19, 29 and 34 respectively is:

      A. 1,394              B. 1,404             C. 1,664              D. 1,406

7. Choose the co-prime numbers :

      A. 7 and 63        B. 36 and 25     C. 35 and 21      D. 63 and 81

8. Successor of every even number is:

      A. even               B. prime             C. odd                 D. none of these

9. HCF of 24, 36 and 92 is:

      A. 24                   B. 36                   C. 12                    D. 4

10. 20 is written as the product of primes as:

      A. 2×5                B. 2×2×3×5      C. 2×2×5           D. 2×2×3

Answer Key:

(1)-B; (2)-A; (3)-A; (4)-B; (5)-B; (6)-A; (7)-B; (8)-C; (9)-D; (10)-C