The sum of all two digit numbers is :
9810
9045
4509
4905
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Which term of the A.P. 3, 10, 17, …….. will be 84 more than its 13th term ?
The sum of 41 terms of an A.P. with middle term 40 is :
820
1640
2460
none of these
The sum of A.P. 4, 7, 10, 13, …….. upto 20 terms is :
650
10 × 27
510
1300
The sum of 40 terms of the A.P. 7 + 10 + 13 + 16 + ….. is :
5240
2620
1310
2680