5 Three numbers which are co-prime to each other are such that the product of the first two is 551 and that of the last two a 1073. The sum of the three numbers is : A) 71 B) 81 C) 85 D) 89
6 The product of the L.C.M. and H.C.F of two numbers is 24. The difference of two numbers is 2. Find the numhers A) 2 and 4 B) 6 and 4 C) 8 and 6 D) 8 and 10
7 The LCM of two numbers is 45 times their HCF. If one of the numbers is 125 and the sum of HCF and LCM is 1150, the other number is : A) 215 B) 220 C) 225 D) 235
8 The maximum number of students among them 1001 pens and 910 pencils can be distributed in such a way that each student gets the same number of pens and same number of pencils is : A) 91 B) 910 C) 1001 D) 1911
9 The least number of five digits which is exactly divisible by 12, 15 and 18, is : A) 10010 B) 10015 C) 10020 D) 10080
10 Let the least number of six digits, which when divided by 4, 6, 10 and 15 leaves in each case the same remainder of 2, be N. The sum of the digits in N is : A) 3 B) 4 C) 5 D) 6
11 Find the least number which when divided by 16, 18, 20 and 25 leaves 4 as remainder in each case, but when divided by 7 leaves no remainder. A) 17004 B) 18000 C) 18002 D) 18004
12 Six bells commence tolling together and toll at intervals of 2, 4, 6, 8, 10 and 12 seconds respectively. In 30 minutes, how many times do they toll together ? A) 4 B) 10 C) 15 D) 16
13 Four different electronic devices make a beep after every 30 minutes, 1 hour, 1.5 hour and 1 hour 45 minutes respectively. All the devices beeped together at 12 noon. They will again beep together at: A) 12 midnight B) 3 a.m. C) 6 a.m D) 9 a.m.
14 A, B and C start at the same time in the same direction to run around a circular stadium. A completes a round in 252 seconds, B in 308 seconds and C in 198 seconds, all starting at the same point. After what time will they meet again at the starting noint ? A) 26 minutes 18 seconds B) 42 minutes 36 seconds C) 45 minutes D) 46 minutes 12 seconds
15 252 can be expressed as a product of primes as : A) 2 x 2 x 3 x 3 x 7 B) 2 x 2 x 2 x 3 x 7 C) 3 x 3 x 3 x 3 x 7 D) 2 x 3 x 3 x 3 x 7
