The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are…
2025
The H.C.F. of two numbers is 23 and the other two factors of their L.C.M. are 13 and 14. The larger of the two numbers is:
- A.
276
- B.
299
- C.
322
- D.
345
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Correct answer: C
When two numbers have H.C.F. h and their L.C.M. is expressed as h times two co-prime factors p and q (p and q share no common factor other than 1), the two original numbers are exactly h times p and h times q.
H.C.F. of the two numbers = 23; the two given co-factors of the L.C.M. are 13 and 14.
Check that 13 and 14 are co-prime: 13 is prime and 14 = 2 times 7, so they share no common factor other than 1 — the co-factor relationship applies directly.
First number = 23 times 13 = 299.
Second number = 23 times 14 = 322.
The larger of 299 and 322 is 322.
Independent check: 322 divided by 23 equals 14 exactly, confirming 23 is a common factor; since 13 and 14 are co-prime, the H.C.F. of 299 and 322 is exactly 23, matching the given condition.
Hence, the larger of the two numbers is 322.