`4 xx 538 xx 25=?`

Find the product by a suitable rearrangement. 4 xx 166 xx 25 .

Find 1963 xx 4 xx 25 = -

Find the product of: (-2) xx (+50) xx (-25) xx 4

25 xx 25 xx 25 xx 25 to be expressed as index of 5.

Prove the following: 103 xx 25 = (100 + 3) xx 25 = (100 xx 25) + (3 xx 25)

What is the value of (2.75 xx 2.75 xx 2.75 - 2.25 xx 2.25 xx 2.25)/(2.75 xx 2.75 + 2.75 xx 2.25 + 2.25 xx 2.25) = ?

What is the largest power of 10 that divides the product 1 xx 2 xx 3 xx 4 … xx 3 xx 24 xx 25 ?