Can You Solve These Insanely Hard Number Sequences?

8/9. Tricky quiz, only one error. I’ll take it.

7 / 9. I made a couple of silly mistakes!

Thanks for answers. Good fun - but not insanely difficult.

Thank you so much for the answers!

9/9 really enjoyed doing that

timwhitestevens, the sequence is: 2x +2 2x +1 2x 2x - 1 2x - 2

R Yancey, easy peasy. How many did you get right?

jastirton, is the last one…

R Yancey, same with me

Fibonacci sequence

For number 6 you take the last digit in the four digits of previous number and put it at the front of the others for the next one in sequence.

9\9 but number 1 was an educated guess. Odd number added the previous number to get the next one and space between sequence keeps getting larger each time.

brezza marina, It is a simple progression. Multiply by 2 then calculate by the next lower number starting with positive 2, then positive 1, then 0, then -1, then -2 1, 4, 9, 18, 35, ? 1 × 2 + 2 = 4 4 × 2 + 1 = 9 9 × 2 + 0 = 18 18 × 2 - 1 = 35 35 × 2 - 2 = 68

brezza marina, Double add 2, double add 1, double, double minus 1, double minus 2.

Are there any workbooks available for learning number sequencing? It's not my strongest area.