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InterviewSolution
| 1. |
The sum of all two digit numbers divisible by 5 is: |
| Answer» Required numbers are 10, 15, 20, 25, ..., 95 This is an A.P. in which a = 10, d = 5 and l = 95. tn = 95 a + (n - 1)d = 95 10 + (n - 1) x 5 = 95 (n - 1) x 5 = 85 (n - 1) = 17 n = 18 Requuired Sum = n (a + l) = 18 x (10 + 95) = (9 x 105) = 945. 2 2 | |