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399 = 21 
19 So it is not a prime number. 621 = 23 27 So it is not a prime number. 363 = 33 11 So it is not a prime number. 461 is a prime number because it is not divisible by any number except 1 & itself. 481 = 37 13 So it is not a prime number.
The HCF of two 3 digit numbers is 17, and their LCM is 1224. Calculate the difference between the two numbers.
LCM of 21 5 , 21 10 and 21 15 is?
(1). 21 5
(2). 21 15
(3).2130
The HCF and LCM of two numbers, A and B, are 14 and 196, respectively. The difference between these two numbers is 28. Find their sum.
Three boys runs around a circular track and takes 10 min, 30 min and 35 min respectively to complete the one round. When do they all come relatively to ...
Find the HCF of 245, 350 and 385.
The HCF of two numbers is 12. Which one of the following can never be their LCM?
If two numbers are in the ratio 2:3, what is the ratio of their HCF to their LCM?
Calculate 50% of the L.C.M of 208 and 216.
The product of two numbers is 3600 and their HCF is 6. Total number of such pairs of numbers is?
Tell the product of two numbers, which are LCM 917 and HCF 1
