Question

answer it fast..... p please​

Answer 1

Answer:

There are 800 numbers

Step-by-step explanation:

Let the numbers be arranged like this..

5   a   b   c   b   a   5

Total number = 10³ = 1000

5   2   a   b   a   2   5      --------   100

5   7   a   b   a   7   5       --------   100

The numbers which are divisible by 25 should be neglected from the 1000 numbers.

There are 100+100 = 200 numbers which are divisible by 25.

So,

The number of 7-digit palindromes which are divisible by 5 and not by 25

= 1000 - 200 = 800

There are 800 numbers

Answer 2

The answer is 800.......