How many numbers between 11 and 90 are divisible by 7?	Answers.
A) 11  B) 13  C) 15  D) 12  E) 10
The required numbers are 14, 21, 28, 35, .... 77, 84.   This is an A.P. with a = 14 and d = (21 - 14)= 
<gadget id="calculator">(21 - 14)</gadget>
<output>7</output>
7.   Let it contain n terms.   Then, Tn= 84 =&gt; a + (n - 1) d = 84   =&gt; 14 + (n - 1) x 7 = 84 or n = 11.   Required number of terms = 11   11nswer is 11.
<result>A</result>
How many numbers between 11 and 90 are divisible by 7?