Question

what is the value of k such that 70k is divisible by 7​

Answer 1

Answer:

70k /7 =0

10k =0

•°•k= -10

hope it will help you.

Answer 2

$\large { \underline{ \bf \red{Question:- }}}$

what is the value of k such that 70k is divisible by 7

$\large { \underline{ \bf \purple{Solution:- }}}$

$\large { \underline{ \bf \pink{Step \: 1 :- }}}$

• In 70k the units place is occupied by k and we need to value for k such that the number is divisible by 7.

$\large { \underline{ \bf \green{Step \: 2:- }}}$

• We know the divisibility rule of 7
• We must choose the last digit of the number and multiply it by 2.

• And subtract the product from the rest of the number .

• And if the difference is zero or divisible by 7 then the whole number is divisible by 7

$\large { \underline{ \bf \blue{Step \: 3:- }}}$

Now let's consider the number 7 from the options.

• So our number will be 707

First we need to multiply the last digit by 2

(Ex) 7 × 2=14

• Now let's subtract 14 from the number formed by the other two digits (Ex)70

Subtracting 14 from 70 , we get

70 – 14 = 56

• Now we know that 56 is divisible by 7

• Hence the number 707 is divisible by 7