For Q6 we can take difference of consecutive number 2-12=10,12-36=24,36-80=44,80-150=70 Again take there difference 10-24=14,24-44=20,44-70=26 etc do nxt will be 32 (6 is commn diff) 70+32=102,102+150=252
Sir u observe 6th problem ... is easy to do as ur told old method ...
Sir pls try to improve audio quality.