Loading [MathJax]/jax/output/HTML-CSS/jax.js
Home / Aptitude Tests / Mathematics / A sequence is given ...
A sequence is given by \(2\frac{1}{2}, 5, 7\frac{1}{2}, .......

A sequence is given by 212,5,712,..... if the nth term is 25, find n

A.

9

B.

10

C.

12

D.

15

Correct answer is B

a=212,nth=a+(n1)d25=212+(n1)21225=52+(n1)522212=5n52452=5n5245=5n55n=50n=10