How many numbers between 11 and 90 are divisible by 7 ?
Choose the correct choice from the following answers:
A) 23
B) 11
C) 22
D) 32
E) 15
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   ANSWER 11 11
<result>B</result>
How many numbers between 11 and 90 are divisible by 7 ?