Three numbers which are co-prime to one another are such that the product of the first two is 551 and that of the last two is 1073. The sum of the three numbers is: 

The LCM of two positive integers is twice the larger number. The difference of the smaller number and the GCD of the two numbers is 4. The smaller number is: 

The number of pairs of positive integers whose sum is 99 and HCF is 9 is: 

A General of an Army wants to create a formation of square from 36562 army men. After arrangement, he found some army men remained unused. 

If the product of three consecutive numbers is 210 then the sum of the smaller numbers is: 

The greatest number that divides 411, 684, 821 and leaves 3, 4 and 5 as remainders, respectively, is 

If the product of three consecutive numbers is 210 then sum of the smaller number is: 

Find the greatest number that will divide 390, 495 and 300 without leaving a remainder.