Find the HCF of 30 and 40 using division method.
2
5
10
15
The ratio of two numbers is 3 : 4 and their H.C.F is 4. Their L.C.M is
12
16
24
48
Which will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30.
196
630
1260
2520
The HCF of two numbers is 11 and their L.C.M is 7700. If one of the numbers is 275, then the other is :
279
283
308
318
The smallest number which when diminished by 7, is divisible by 12, 16, 18, 21 and 28 is
1008
1015
1022
1032
A, B and c, start at the same time in the same direction to run around a circulr stadium. A completes a round in 252 second, 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 seconds
42 minutes and 36 seconds
45 minutes
46 minutes and 12 seconds
Three numbers are in the ratio 3 : 4: 5 and their LCM is 2400. Their HCF is
40
80
120
200
The LCM of two numbers is 48. The numbers are in the ratio 2 : 3 .The sum of the number is
28
32
64
The greatest number of four digits which is divisible by 15, 25, 40 and 75 is
9000
9400
9600
9800
Find the HCF of 90 and 110 using factor method.
45
