Question
The sum of two numbers is 65 and their HCF is 13. Total
number of such pairs of numbers is?  ÂSolution
As HCF is 13 so let numbers be 13x & 13y. It means x & y must be co-prime. Now 13x+ 13y = 65, So x + y = 5. Now pairs of (x , y) can be (1,4) , (2,3) and all are co-prime so number of pairs are 2. Â
More HCF and LCM Questions
1137, 1138, 1142, 1151, 1185, 1310Â
224, 183, 144,115, 86, 63, 44.
Find the wrong number in the given number series,
31, 55, 91, 145, 217, 307
Find the wrong number in the given number series.
30, 60, 130, 210, 350, 520
124, 132, 118, 140, 108, 148
Direction: Find the wrong number in given number series.
214, 230, 294, 550, 1574 , 5470.
128, 128, 64, 192, 42 , 240
45, 125, 214, 312, 420, 535
Find the wrong number in the given number series.
12, 6, 6, 9, 18, 54
- Find the wrong number in the given number series.
7, 35, 42, 126, 128, 118
Relevant for Exams:
