Sum of the first `3` terms common to the two arithmetic sequences ; `(1,4,7,10,13....)` and `(3,8,13,18,......)` is

Find the general (n^(th)) term for the arithmetic sequence : 1,4,7,10,13,16,…..

Find the number of terms common to the two arithmetic progression 5,9,13,17,…,216 and 3,9,15,21,…..,321

Sum of the first 18 terms of the series 1+4+7+......

Sum of the first 18 terms of the series 1+4+7+......

The number of common terms between the sequences given by 1,4,7,10.....298 and 2,4,6,8....300 is

Number of terms common in the first 100 terms of the arithmetic progression 1+4+7+10+13+........ and 2+6+10+14+....... is