Download Aptitude Crack
img not found img not found

Numbers

Q1:

The sum all even natural numbers between 1 and 31 is:

A 16

B 128

C 240

D 512

ANS:C - 240

Required sum = (2 + 4 + 6 + ... + 30) This is an A.P. in which a = 2, d = (4 - 2) = 2 and l = 30. Let the number of terms be n. Then, tn = 30     a + (n - 1)d = 30  2 + (n - 1) x 2 = 30  n - 1 = 14  n = 15

Sn = n (a + l) = 15 x (2 + 30)   = 240.
2 2



img not found
img

For help Students Orientation
Mcqs Questions

One stop destination for examination, preparation, recruitment, and more. Specially designed online test to solve all your preparation worries. Go wherever you want to and practice whenever you want, using the online test platform.