Subject
Quantitative Aptitude
Topic
Number
The sum of all two digit numbers divisible by 5 is:
The sum of all two digit numbers divisible by 5 is:
ক)
1035খ)
1245গ)
1230ঘ)
945Explanation
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 So, Required Sum = (n/2) x (a + l) = (18/2) x (10 + 95) = (9 x 105) = 945.Related questions
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