Multiple & Factors Worksheet-10
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Prime factors of 140 are:
A. 2×2×7 B. 2×2×5 C. 2×2×5×7 D. 2×2×5×7×3
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LCM of 81, 18 and 36 is:
A. 81 B. 162 C. 324 D. 36
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Example for co-prime numbers is:
A. 25, 14 B. 18, 16 C. 9, 18 D. 11, 77
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The sum of the first five multiples of 6 is:
A. 90 B. 60 C. 30 D. 120
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The LCM of two numbers is x and their HCF is y. The product of twonumbers is:
A. x/y B. y/x C. x + y D. xy
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The least number which when decreased by 7 is exactly divisible by 12, 16, 18, 21 and 28 is:
A. 1,012 B. 1,008 C. 1,015 D. 1,022
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The smallest number of 4-digits exactly divisible by 12, 15, 20 and 35 is:
A. 1,000 B. 1,160 C. 1,260 D. none of these
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The greatest number that will divide 37, 50, 123 leaving remainder 1, 2 and 3 respectively is:
A. 9 B. 10 C. 15 D. 12
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The HCF of two number is 28 and their LCM is 336. If one number is 112 then the other number is:
A. 64 B. 84 C. 34 D. none of these
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The two consecutive prime numbers with difference 2 are called:
A. Co-primes B. twin primes
C. composite D. none of these
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The numbers which are not multiples of 2 are called:
A. Even B. odd C. prime D. composite
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The two numbers which have only 1 as their common factor are called:
A. Co-primes B. twin prime C. composite D. none of these
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The numbers which have only two factors (1 and the number itself) are called as:
A. composite B. even C. prime D. none of these
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The numbers which have more than two factors are called:
A. even B. prime C. composite D. none of these
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The number which is neither prime nor composite is:
A. 0 B. 1 C. 2 D. 5
Answer Key:
(11)-C; (12)-C; (13)-A; (14)-A; (15)-D; (16)-C; (17)-C; (18)-D; (19)-B; (20)-B; (21)-B; (22)-A; (23)-C; (24)-C; (25)-B
