Question

if the number 21x5 is divisible by 3, then the digits in place of x is:

$1)0 \\ 2)1 \\ 3)2 \\ 4)5$
​

Answer 1

Answer:

answer is

Step-by-step explanation:

answer is option (2) = 1

kyoki 3 k multiple ki addition hmesha 3 ka divisible hota hai

so 2+1+x+5=8+x

if we add 1 then 8+x =9 ho jayega

or 9 , 3 ka divisible hai

Answer 2

Given data: 21x5 is divisible by 3

To find: The value of x

Solution:

• Division is one of the arithmetic operation in which the numerator and denominator is dividable by same multiple number.
• According to mathematic rule, by using dividend and divisor we get quotient.
• Simplifying the given data 21x5 is divisible by 3. In this case there are 4 options 0, 1, 2 and 5.
• In the place of x we need to substitute the value given in options one by one.
• From the given number 21x5, 21 is divisible by 3. Now if we give the value of x as 0, 2 and 5, it will not be divisible by 3.
• 2) Hence the value of x is 1 (2115 is divisible by 3).