Find the number of terms common to the two A.P. ` s` : `3,7,11 , 407a n d2,9,16 , ,709.`

Find the number of terms common to the two AP's 3,7,11,15.... 407 and 2, 9 ,16.......709.

Find the number of terms common to the two AP's 3,7,11,15....407 and 2,9,16......09.

The number of terms common to the two A.P 's 3,7,11,……, 407 and 2,9,16,….709 is ____________

The number of terms common to two A.P.'s 3,7,11, "………..", 407 and 2,9,16, "………" 709 is :

Find the sum to 25 terms of the A.P. 5, 7, 9, 11, …

Find the sum to 25 terms of the A.P. 5, 7, 9, 11, …

Find the number of common terms in two A.P.'s 1, 4, 7, ... & 9, 16, 23, ..... that are less than 100.

The number of common terms in both sequence 3,7,11,...,407 and 2,9,16,...,905 are

Determine the number of terms in the terms in the A.P. 3,7,11…407. Also, find its 20th term from the end.

Find the sum of indicated number of terms of the following A.P.’s : 5, 2, -1, - 4, -7, ......., n terms.