The least number is a perfect square and is also divisible by 10,12,15 and 18 is?
(A) 3600
(B) 2500
(C) 1600
(D) 900
Three bells ring at interval of 36 seconds, 40 seconds and 48 seconds respectively. They start ringing together at a par- ticular time They will ring to gether after every
(A) 6 minutes
(B) 12 minutes
(C) 18 minutes
(D) 24 minutes
The ratio of HCF and LCM of two numbers a and b is 1:30 and the difference between the HCF and LCM is 493. Find the possible number of pairs of a and b.
(A) 1
(B) 2
(C) 5
(D) 4
The difference between the greatest and least prime numbers which are less than 100 is:
(A) 95
(B) 96
(C) 97
(D) 94
The smallest five digit number which is divisible by 12, 18 and 21 is:
(A) 10080
(B) 30256
(C) 10224
(D) 50321
If the least common multiple of two numbers, 1728 and K is 5184, then how many values of K are possible?
(A) 6
(B) 7
(C) 11
(D) 8
The ratio of two numbers is 3 : 4 and their HCF is 5. Their LCM is :
(A) 15
(B) 12
(C) 10
(D) 60
The maximum number of students among whom 1001 pens and 910 pencils can be distributed in such a way that each student gets same number of pens and same number of pencils, is:
(A) 91
(B) 910
(C) 1001
(D) 1911
Two numbers are in the ratio 3 : 4. If their LCM is 240, the smaller of the two number is
(A) 60
(B) 50
(C) 100
(D) 80
Find the least multiple of 23, which when divided by 18, 21 and 24 leaves the remainder 7, 10 and 13 respectively.
(A) 3013
(B) 3024
(C) 3002
(D) 3036
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