Math, asked by priyanshu3615, 2 months ago

21x5 is a multiple of 3 find x

Answers

Answered by 0209009

3

Answer:

x=1

Step-by-step explanation:

divisibility rule of 3: the digits should add up to a multiple of 3. in this case,

2+1+5+x= 8+x

therefore, x=1 because 8+1=9, which is divisible by 3

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