Question

For what value of n, 2n*5n ends in 5.

Answer 1

Step-by-step explanation:

If n=2,

      2²×5²=100

100 doesn't end with 5.

∴For natural no. n, 2ⁿ×5ⁿ doesn't end with digit 5.

Answer 2

Answer:

If n=2

2²×5²=100 5²=25,

2²=4,

25×4=100

so,100 doesn't end in 5

Thank you