100+ HCF and LCM Questions and Answers for SSC Exams - 1
Question: 1
Which greatest number will divide 3026 and 5063 leaving remainders 11 and 13 respectively?
(A) 10
(B) 25
(C) 35
(D) 45
Ans: D
Required number = H.C.F. of (3026 – 11) and (5053 – 13)
= H.C.F. of 3015 and 5040 = 45.
Question: 2
The least number which when increased by 5 is divisible by each one of 24, 32, 36 and 54 is
(A) 859
(B) 869
(C) 4320
(D) 4520
Ans: A
Required number = (L.C.M. of 24, 32, 36, 54) – 5 = 864 – 5 = 859.
Question: 3
Find the two largest numbers of four digits having 531 as their H.C.F.
(A) 9027, 9558
(B) 9037, 9568
(C) 9127, 9658
(D) 9231, 9762
Ans: A
The greatest number of four digits divisible by 531 is 9558, so the other number is 9558 – 531 = 9027.
Thus, the numbers are 9558 and 9027.
Question: 4
What is the least number of cut pieces of equal length that can be cut of two lengths 10 m 857 mm and 15 m 87 mm?
(A) 164
(B) 172
(C) 184
(D) 194
Ans: C
H.C.F. of 10857 and 15087 is 141.
The least number of cut pieces = $$({10857 + 15087}) / {141})$$ = 184.
Question: 5
The greatest number that will divided 187, 233 and 279 leaving the same remainder in each case is
(A) 30
(B) 34
(C) 42
(D) 46
Ans: D
Required number = HCF of (223 – 187), (279 – 233) and (279 – 187)
= HCF of 46, 46 and 92 = 46.
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