["Show that each of the following is a composite number: "],[[" (i) "5times11times13+13," (ii) "6times5times4times3times2times1+5],[" We have "]]

1 times 2times3+2 times 3times4+3 times 4times5+.... =?

1 times 2times3+2 times 3times4+3 times 4times5+.... =?

Explain Why 7times11times13times+13 and 7times6times5times4times3times2times1times+5 are composite number.

Explain why (7 times 11 times 13)+13 " and " (7 times 6 times 5 times 4 times 3 times 2 times 1)+5 are composite numbers.

Evaluate : 5/4 times 4/5 times 6/5 times 3/6 times 6/3 times 5/4 times 8/3 times 2/4

Express the following in exponential form: (i) "6 times 6times6 times 6 (ii) t times t (iii) b times b times b times b times b times b (iv) 5 times 5times7 times 7times7 (v) "2 times 2times a times a (vi) a times a times a times c times c times c times c times d times 1

(1/3times-1/2)times5/6 = (5/6 times 1/3)times-1/2

Evaluate : 13 times 13 times 13 times a times a times a times a times a times b times b times b times b

Evaluate 13 times 13 times 13times a times a times a times a times a times b times b times b times b

Solve : (-2 ) times (-3 ) times (-4 ) times (-5 ) times (-6 )