HCF ,LCM

Find the greatest number that will divide 43, 91 and 183 so as to leave the same remainder in each case

• 4

• 7

• 9

• 13

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 ?

• 4

• 10

• 15

• 16

The greatest number of four digits which is divisible by 15, 25, 40 and 75 is:

• 9000

• 9400

• 9600

• 9800

The product of two numbers is 4107. If the H.C.F. of these numbers is 37, then the greater number is:

• 101

• 107

• 111

• 158

Three number are in the ratio of 3 : 4 : 5 and their L.C.M. is 2400. Their H.C.F. is:

• 40

• 80

• 120

• 200

Reduce 128352 to its lowest terms.

238368

• 3/4

• 7/13

• 5/13

• 9/13

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 again at the starting point ?

• 26 minutes and 18 second

• 42 minutes and 36 seconds

• 45 minutes

• 46 minutes and 12 seconds

The greatest possible length which can be used to measure exactly the lengths 7 m, 3 m 85 cm, 12 m 95 cm is:

• 15 cm

• 25 cm

• 35 cm

• 42 cm

Which of the following has the most number of divisors?

• 99

• 101

• 176

• 182

The H.C.F. of 9 ,12 , 18 and 21 is:

10 25 35 40

• 3/5

• 3/1400

• 3/1200

• 63/700