HCF and LCM Practice Question and Answer
8 Q: The smallest five digit number which is divisible by 12, 18 and 21 is:
818 064008e9486fd4161466a42f7
64008e9486fd4161466a42f7- 110080true
- 230256false
- 310224false
- 450321false
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Answer : 1. "10080 "
Q: The HCF and the LCM of two numbers are 5 and 120, respectively. If the sum of the two numbers is 55, then the sum of the reciprocals of these two numbers is equal to:
808 0642256d95bff3d098d0b919f
642256d95bff3d098d0b919f- 1$${{55}\over{601}}$$false
- 2$${{11}\over{120}}$$true
- 3$${{120}\over{11}}$$false
- 4$${{601}\over{55}}$$false
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Answer : 2. "$${{11}\over{120}}$$"
Q: The sum of two and the product of 23 is 120. The sum of the areas will be:
799 06319b42ab0a2a82fc54c136c
6319b42ab0a2a82fc54c136c- 1289true
- 2263false
- 3486false
- 4313false
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Answer : 1. "289"
Q: By what least number should 21600 be multiplied to make it a perfect square?
797 06319b8ee4c69013ac89cd5f6
6319b8ee4c69013ac89cd5f6- 152false
- 223false
- 369false
- 4Nonetrue
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Answer : 4. "None "
Q: The HCF of two numbers is 24. If sum of the numbers is 480, how many such pairs of numbers are possible?
767 062f11c3f09a97851b6264959
62f11c3f09a97851b6264959- 12false
- 25false
- 34true
- 43false
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Answer : 3. "4 "
Q: Find the LCM and HCF of 27 and 81.
751 0630df59c5dea296d12575e78
630df59c5dea296d12575e78- 181; 27true
- 281; 81false
- 327; 81false
- 427; 27false
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Answer : 1. "81; 27"
Q: The LCM of two numbers is 48. If those numbers are in the ratio 2 : 3 then what will be their sum?
748 0630deb024e3bf85cbe74880c
630deb024e3bf85cbe74880c- 128false
- 232false
- 340true
- 464false
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Answer : 3. "40"
Q: LCM of two numbers is 56 times their HCF, with the sum of their HCF and LCM being 1710. If one of the two numbers is 240, then what is the other number?
740 0646ca3ed45f1450a80e46bc9
646ca3ed45f1450a80e46bc9- 11680false
- 2171false
- 3210true
- 457false
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