HCF and LCM Aptitude Questions Practice Question and Answer
8 Q: What is the L.C. M of $$ {2\over 5},{3\over 10},{4\over 15}$$.
641 0602cc7819f2a38430905cdb8
602cc7819f2a38430905cdb8- 1$$ {12\over 15}$$false
- 2$$ {1\over 30}$$false
- 3$$ {12\over 5}$$true
- 4None of thesefalse
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Answer : 3. "$$ {12\over 5}$$"
Q: The L.C.M and H.C.F of the two numbers are 84 and 21 respectively. If the numbers have a ratio of 1: 4, what is the larger number?
689 0602cc6b9a6ca4d5b0bb3d5d8
602cc6b9a6ca4d5b0bb3d5d8- 156false
- 284true
- 382false
- 415false
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Answer : 2. "84"
Q: If (x + k ) is the common factor of x2 + ax + b and x2 + cx + d , then what is k equal to ?
803 060112f43178b94051cea1156
60112f43178b94051cea1156- 1$$ {(d-b)\over {(c-a)}}$$true
- 2$$ {(d-b)\over {(a-c)}}$$false
- 3$$ {(d+b)\over {(c+a)}}$$false
- 4$$ {(d-b)\over {(c+a)}}$$false
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Answer : 1. "$$ {(d-b)\over {(c-a)}}$$"
Q: What is the highest common factor of 2x3 + x2 -x -2 and 3x3- 2x2 + x - 2 ?
1168 060112efcaf82aa3010a21537
60112efcaf82aa3010a21537- 1x – 1true
- 2x + 1false
- 32x + 1false
- 42x – 1false
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Answer : 1. " x – 1"
Q: The HCF and LCM of two numbers are 21 and 4641 respectively. If one of the numbers lies between 200 and 300, then the two numbers are-
838 0600a9f20bc7633585f489302
600a9f20bc7633585f489302- 1273, 357true
- 2273,361false
- 3273, 359false
- 4273, 363false
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Answer : 1. "273, 357"
Q: The sum of the HCF and LCM of two numbers is 680 and the LCM is 84 times the HCF. If one of the numbers is 56, the other is :
981 05ffeb30e4426b26e3e5a54c2
5ffeb30e4426b26e3e5a54c2- 184false
- 212false
- 38false
- 496true
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Answer : 4. "96"
Q: Three men step off together from the same spot. Their steps measure 63 cm, 70 cm and 77 cm respectively. The minimum distance each should cover so that all can cover the distance in complete steps is
796 05ffeb2a84426b26e3e5a5347
5ffeb2a84426b26e3e5a5347- 19630 cmfalse
- 29360 cmfalse
- 36930 cmtrue
- 46950 cmfalse
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Answer : 3. "6930 cm"
Q: Find the L.C.M of $$ {6x}{y^{2}z},{8x^{2}{y^{3}z^{2},{12{x^{3}{y^{3}z^{3}}}}}}$$.
869 05f96be26eed3d00d4bc4c3b9
5f96be26eed3d00d4bc4c3b9- 12xyzfalse
- 2$$ {4x}{y^{2}z}$$false
- 3$$ {3x}{y^{2}z}$$false
- 4$$ {2x}{y^{2}z}$$true
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