To find: 10th common term between the APs
Common difference of 1st series = 4
Common difference of 2nd series = 5
LCM of common difference will give us a common difference of new series
⟹ 5 × 4
⟹ 20
The first term of new AP will be 11, so the 10th = term of this series is
⟹ 11 + 20 × 9
⟹ 191