#21 - Hard Find The Odd One Out Problem
Find the Odd One Out ?
84129
32418
47632
36119
67626
72927

47632
All the others are three digit numbers followed by their square root, eg 361 followed by its square root, 19.
Find the Odd One Out ?
84129
32418
47632
36119
67626
72927
47632
All the others are three digit numbers followed by their square root, eg 361 followed by its square root, 19.
You can see a blue figure and then, there are seven different figures that seems to be identical to the blue one however not all are. Can you find the identical ones to the blue figure?
B, D and E are identical to the blue figure.
Can you find the odd number in the following?
2716, 4135, 5321 and 7145
2716 is the odd one out.
This is because the rest of the numbers add up to be a prime number.
4 + 1 + 3 + 5 = 13
5 + 3 + 2 + 1 = 11
7 + 1 + 4 + 5 = 17
However, in the case of 2716,
2 + 7 + 1 + 6 = 16 which is not a prime number.