Question

The successor of a number is written as ⬜▽▽ and the predecessor of the number is ◯⬜◯. if the number is ◯⬜⬜, find the number.

Answer 1

predecessor of that no. which we given

Answer 2

The number is 899

Solution:

The successor of a number means number which comes immediately after the particular number. The predecessor means number which comes before a particular number is called Predecessor.

Let x is the number its successor  

It seems to be three digit numbers and for X-1 the units place and 100’s place value would be same as well. The  

By satisfying the above conditions, it’s always suggestible to prefer the last digits of series (199, 299, etc.) because these values will satisfy the conditions above mentioned.

Let try for 199

x-1 = 198

x =    199

x+1 = 200.

In this combination the value is not satisfying the condition. Such that, will try for other combination 299.,

x-1 = 298

x     = 299

x+1 = 300

Similarly, the value 899

X-1 = 898

x   = 899

x+1 = 900

Therefore, the number would be 899.