Explain why 7X11X13X15+15 are composite numbers
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Answered by
13
7 × 11 × 13 + 13
Taking 13 common, we get
13 (7 x 11 +1 )
13(77 + 1 )
13 (78)
It is product of two numbers and both numbers are more than 1 so it is a composite number.
7 × 6 × 5 × 4 × 3 × 2 × 1 + 5
Taking 5 common, we get
5(7 × 6 × 4 × 3 × 2 × 1 +1)
5(1008 + 1)
5(1009)
5,045
It is product of two numbers and both numbers are more than 1 so it is a composite number.
Taking 13 common, we get
13 (7 x 11 +1 )
13(77 + 1 )
13 (78)
It is product of two numbers and both numbers are more than 1 so it is a composite number.
7 × 6 × 5 × 4 × 3 × 2 × 1 + 5
Taking 5 common, we get
5(7 × 6 × 4 × 3 × 2 × 1 +1)
5(1008 + 1)
5(1009)
5,045
It is product of two numbers and both numbers are more than 1 so it is a composite number.
mahendrasinghsaharan:
very nicely answered dear
30030
and it is very simple
you don't know multiply
but u had taken wrong digits
thats why your answer is also wrong
your questions is 7×11×13×15+15 ya
Answered by
3
Because this number is devided by
1 ,3,5,and other and itself
1 ,3,5,and other and itself
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