| The only number . . . | Number | % Correct |
|---|---|---|
| that is equal to itself squared | 1 | 100%
|
| whose digits multiply to 10 | 25 | 93%
|
| that is an odd perfect square | 9 | 93%
|
| that is a perfect cube | 8 | 90%
|
| that is prime and greater than 20 | 23 | 89%
|
| with exactly four letters when spelled out | 5 (five) | 89%
|
| ending in 5 | 15 | 88%
|
| that is even and prime | 2 | 88%
|
| that is a multiple of 8 | 24 | 88%
|
| with exactly 3 factors | 4 | 88%
|
| that is a perfect square | 16 | 87%
|
| that contains 0 | 10 | 86%
|
| with the same digit repeating | 11 | 86%
|
| beginning with 2 | 20 | 86%
|
| that is larger than 20 | 22 | 85%
|
| that contains 2 | 12 | 84%
|
| that is a single digit | 7 | 84%
|
| which is part of the Fibonacci sequence | 13 | 83%
|
| which is odd and composite | 21 | 83%
|
| that is a triangular number(e.g. 1, 1 + 2, 1 + 2 + 3) | 3 (1 + 2) | 83%
|
| that is a single-digit composite number | 6 | 83%
|
| which has exactly 6 factors | 18 | 82%
|
| that is composite | 14 | 80%
|
| that is a Leyland number (i.e. can be written as ab + ba with a, b ≠ 1 like 32 = 24 + 42) | 17 (23 + 32) | 80%
|
| that is an integer | 19 | 80%
|