Question

Find the least value of * so that the number 73818*4 is divisible by 8 *


​

Answer 1

* = 2

A number is divisible by 8 if the number formed by the last 3 digits (here, 8*4) is divisible by 8.

So, 8*4 must be divisible by 8.

By hit and trial, we find that

* = 2 and * = 6 are the solutions

Here, least value is 2

Answer 2

2 is least value of x so that the number 73818x4 is divisible by 8.

Complete question :

Find the least of value of ‘x’ so that the number 73818x4 is divisible by 8

a)1

b)2

c)3

d)4

e)6

Answer:

Correct answer is option 'b' = 2.

Step-by-step explanation:

A number is exactly divisible by 8,

then the last 3 digits of the numbers must be divisible by 83

Here, the last 3 digits are 8x4.

Put each value in given options in the place of x and check whether it is divisible by 8 or not .

When x=1, 814 → Not Divisible

When x=2, 824→ Divisible

Option b , 824 which is exactly divisible by 8.

So , answer is option (b)

Divisibility rules in math are a set of specific rules that apply to a number to check whether the given number is divisible by a particular number or not. Some known divisibility tests are for numbers 2 to 20. It helps us to find the factors and multiples of numbers without performing long division.

(#SPJ2)