Number Classification and Analogy

Among 120, 168, 290, and 380, the number 380 is different because it's the only one that when divided by 10 gives a number (38) that is even but not divisible by 3. Alternatively, 120, 168, and 290 are all divisible by 2 but not all by 4, while 380 is divisible by 4. The exact pattern is unclear but the stated answer is D.

N² + 3

Among 369, 462, 761, and 862, the number 761 is different because it's the only prime number in the group. 369=3×123, 462=2×231, and 862=2×431 are all composite numbers. This makes 761 the odd one out.

Looking at the sequences: B (2,8,4,16) follows ×4,÷2,×4. C (1,4,2,8) follows ×4,÷2,×4. D (3,12,6,24) follows ×4,÷2,×4. But A (4,16,24,12) follows ×4, then +8 (not ÷2), breaking the consistent pattern. This makes sequence A the odd one out.

The numbers 15, 63, and 143 are all composite odd numbers (15 = 3×5, 63 = 7×9, 143 = 11×13). However, 257 is a prime number (only divisible by 1 and itself), making it the odd one out in this set.

Yes, it is correct. All the three digits have the centre digit, which is equal to the sum of first and the last digit except 514.

Yes, it is correct. All the numbers are cubes except 215.

128/8 = 16 96/6 = 16 244/8 = 30.5 30.5 x 6 = 183

293, 29 - 3 = 26 487, 48 - 7 = 41 41 - 26 = 15

3 x 10 - 4 = 26 13 x 10 - 6 = 124

525/21 = 25  315/21 = 15

Correct

32 x (3 + 2) = 160

6 x 6 = 36 5 x 5 x 5 = 125

292/2 = 146 Similarly, 582/2 = 291