Question

without actual division show that each of the following number is divisible by 7
7777
77077
770077
7700077​

Answer 1

Answer:

To get the divisibility of 7 the given trick you should use-

Step-by-step explanation:

Remove the last digit from the number , double it and subtract it from the first part of the number do this respectively until you get something you recognise as being divisible by 7 or not .

Q-1

Solving 7777

1)Remove 7 then double it 14.

2) Subtract 14 from 777 then 763

3)763 is divisible by 7.

Since, 7777is divisible by 7.

Q-2

Solving 77077

1) Remove 7 then double it 14.

2) Subtract 14 from 7707 then 7,693.

3)7,693 is divisible by 7.

Since ,77077is divisible by 7.

Answer 2

Answer:

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