15.4times13.5times?=2598.75

Evaluate : 4/5 times ( -2/5 ) - 2/5 times 1/3 + 3/5 times 4/5 =

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

Prove that : (0. 87 \times 0. 87 \times 0. 87+0. 13 \times 0. 13 \times 0. 13)/(0. 87 \times 0. 87-0. 87 \times 0. 13 + 0. 13 \times 0. 13)=1

(1)/(1times3)+(1)/(3times5)+(1)/(5times7)+(1)/(7times9)+(1)/(9times11)+(1)/(11times13)

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

(4^(5)times a^(8)times b^(3))/(4^(5)times a^(5)times b^(2))