Q.

Among the following, the number divisible by 7 is

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a

791 

b

790 

c

981 

d

982 

answer is A.

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Detailed Solution

 

For divisibility rule 7 ”double the unit digit and subtract from remaining two digit number, the result must be 7 multiple ”

Option 1)

2 1 =2792=77

(is 7 multiple) it is divisible by 7

Option 2)

 

2 0 =0790=79

(is not 7 multiple)

Option 3)

2 1 =2982=97

(is not 7 multiple)

Option 4)

2 2 =4984=94

(is not 7 multiple)

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