without actual division show that each of the following number is divisible by 7
7777
77077
770077
7700077
Answers
Answered by
18
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.
Sakshithegenius:
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Answered by
7
Answer:
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