Number Series Online Quiz

The pattern is: 3 + 17 = 20; 20 + 68 = 88; 88 + 185 = 273. The differences are 17, 68, 185. This does not follow a clear simple progression, but 554 is marked correct.

The pattern is: 31-1=2; 21+0=2; 21+1=3; 32+2=8; 84+3=35; 356+4=214. The logic is complex, but 204 is marked correct.

The differences are: 9-6=3; 20-9=11; 47-20=27; 106-47=59. Second differences: 8, 16, 32. The next second difference is 64. 59+64=123. 106+123=229.

The differences are: 1.2, 2.8, 4.4, 6.0. These increase by 1.6 each time. The next difference is 7.6. 19.4 + 7.6 = 27.

The pattern is: 51+1=6; 62+2=14; 141+9=23; 233+18=87. This does not follow a standard simple pattern, but 112 is marked correct.

The pattern follows (n * 1) + 2, (n * 2) + 2, (n * 3) + 2, (n * 4) + 2, (n * 5) + 2. Specifically: 41+2=6, 62+2=14, 143+2=44, 444+2=178, 178*5+2=892.

The pattern is multiplication by 1.5, 2, 2.5, 3, 3.5. Specifically: 31.5=4.5, 4.52=9, 92.5=22.5, 22.53=67.5, 67.53.5=236.25, 236.254=945.

The pattern is (n * 0.5) + 0.5, (n * 1) + 1, (n * 2) + 2, (n * 4) + 4, (n * 8) + 8. Specifically: 60.5+0.5=3.5, 3.51+1=4.5, 4.52+2=11, 114+4=48, 48*8+8=392.

The pattern is multiplication by 0.5, 1.5, 2.5, 3.5, 4.5. Specifically: 160.5=8, 81.5=12, 122.5=30, 303.5=105, 105*4.5=472.5.

The pattern is -1, +4, -9, +16, -25. Specifically: 13-1=12, 12+4=16, 16-9=7, 7+16=23, 23-25=-2.

The differences are 3, 5, 9, 15. The second differences are 2, 4, 6. The next second difference is 8, so 15+8=23. 43+23=66.

The pattern is (n * 1) - 2, (n * 2) - 3, (n * 3) - 4, (n * 4) - 5, (n * 5) - 6. Specifically: 71-2=5, 52-3=7, 73-4=17, 174-5=63, 63*5-6=309.

The differences are 3, 7, 13, 21. The second differences are 4, 6, 8. The next second difference is 10, so 21+10=31. 86+31=117.

The differences are: 13-11=2, 20-13=7, 48-20=28, 111-48=63. These are 1×2, 2+5, 4×7, 9×7. Alternatively, differences of differences: 5, 21, 35, which increase by 16, 14. This is an inconsistent pattern. However, if we consider 2, 7, 28, 63 as following ×3.5, ×4, ×2.25, the next could be 111 + 126 = 237.

The differences are 7, 16, 26, 37. The second differences are 9, 10, 11. The next second difference is 12, so 37+12=49. 93+49=142.