252 can be expressed as a product of primes as.
2 x 2 x 3 x 3 x 7
2 x 2 x 2 x 3 x 7
3 x 3 x 3 x 3 x 7
2 x 3 x 3 x 3 x 7
Find the LCM of 12 and 15 using multiples method
15
12
30
60
Three numbers are in the ratio 3 : 4: 5 and their LCM is 2400. Their HCF is
40
80
120
200
Find the HCF of 90 and 110 using factor method.
45
10
5
2
The HCF of two numbers is 23 and the other two factors of their LCM are 13 and 14. The larger of the two numbers is
276
299
322
345
Find the HCF of 34 and 78 using the rule of divisibility.
1
3
4
Which will be the least number which when doubled will be exactly divisible by 12, 18, 21 and 30.
196
630
1260
2520
The greatest number of four digits which is divisible by 15, 25, 40 and 75 is
9000
9400
9600
9800
Find the HCF of 30 and 40 using division method.
The smallest number which when diminished by 7, is divisible by 12, 16, 18, 21 and 28 is
1008
1015
1022
1032
