Practicing Success
The second number in the given number pairs is obtained by performing certain mathematical operation(s) on the first number. The same operation(s) are followed in all the number pairs, except one. Find that odd number pair. |
3 : 7 15 : 63 8 : 26 23 : 123 |
23 : 123 |
THE LOGIC; 1) 3 : 7; 3 x2+1 = 7 2) 15 : 63; 15 x4+3 = 63 3) 8 : 26, 8 x3+2 = 26 3) 23 : 123, 23 x5+2 = 115 not 123 Thus, 23 : 123 is the odd one. |