Question

What is the smallest number to be played in place of∆in the number 317∆2 so that the number formed is divisible by 9? Answer is5​

Answer 1

Answer:

Δ = 5

Step-by-step explanation:

Condition:-

⇒ Numbers are divisible by 9 if the sum of all the individual digits is evenly divisible by 9

Here,

the given number is 317Δ2,

Sum of all digits = 3 + 1+ 7 + Δ + 2

                            = 13 + Δ

If we put 5 in place of Δ then sum will be 18, which is divisible by 9

Hence Δ = 5