## Difficult

Q1) What is the nth term of -3,-4,-3,0,5... ?
Q1) What is the nth term of 15,29,49,75,107... ?
Q1) What is the  16th term of 16,26,40,58,80...?
Q2) What is the nth term of 3,8,15,24,35... ?
Q2) What is the nth term of -3,7,21,39,61... ?
Q2) What is the  13th term of -7,-1,11,29,53...?
Q3) What is the nth term of -6,-3,2,9,18...
Q3) What is the nth term of 14,25,42,65,94... ?
Q3) What is the  12th term of 14,24,38,56,78...?
Q4) What is the nth term of -7,-4,1,8,17...
Q4) What is the nth term of 11,24,43,68,99... ?
Q4) What is the  12th term of 9,13,21,33,49...?
Q5) What is the nth term of 10,22,36,52,70... ?
Q5) What is the nth term of 4,18,38,64,96... ?
Q5) What is the  15th term of 16,28,46,70,100...?
Q6) What is the nth term of 7,16,27,40,55... ?
Q6) What is the nth term of -4,-2,4,14,28... ?
Q6) What is the  11th term of 18,32,52,78,110...?
Q7) What is the nth term of 11,24,39,56,75... ?
Q7) What is the nth term of -5,1,13,31,55... ?
Q7) What is the  19th term of 9,16,29,48,73...?
Q8) What is the nth term of 5,8,13,20,29...
Q8) What is the nth term of -2,8,22,40,62... ?
Q8) What is the  15th term of -8,-4,4,16,32...?
Q9) What is the nth term of 5,12,21,32,45... ?
Q9) What is the nth term of 7,14,27,46,71... ?
Q9) What is the  17th term of 8,14,26,44,68...?
Q10) What is the nth term of -2,-2,0,4,10... ?
Q10) What is the nth term of 6,12,24,42,66... ?
Q10) What is the  18th term of 3,7,17,33,55...?