My guess is 65. I don't know what sequence the first, third numbers are but observing the others it is going 61...63.....65....67
9
46. It's the square numbers with their digits reversed: 9 → 9 = 32 61 → 16 = 42 52 → 25 = 52 63 → 36 = 62 94 → 49 = 72 ??? 18 → 81 = 92 The missing number is the square of 8 with its digits reversed: 82 = 64 → 46.
Only 63 is a composite. 63 = 3 x 3 x 7 The other three numbers (13, 31, 61) are all prime numbers.
The numbers are 57, 59, 61 and 63.
The numbers are 57, 59, 61 and 63.
49, 64, 81
9
18
The pattern is the squared numbers with the digits reversed. 92 = 81 → 18 82 = 64 → 46 72 = 49 → 94 62 = 36 → 63 52 = 25 → 52 42 = 16 → 61
The two consecutive numbers that lie between 61 are 62 and 63. Consecutive numbers are those that follow one another in order, so after 61, the next two are 62 and 63.
No.
53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64
46. It's the square numbers with their digits reversed: 9 → 9 = 32 61 → 16 = 42 52 → 25 = 52 63 → 36 = 62 94 → 49 = 72 ??? 18 → 81 = 92 The missing number is the square of 8 with its digits reversed: 82 = 64 → 46.
61, 67, are prime numbers - 63 is not - 63 is a composite number.
Only 63 is a composite. 63 = 3 x 3 x 7 The other three numbers (13, 31, 61) are all prime numbers.
60, 61, 62, 63
61 and 2