The difference between the squares of two consecutive odd integers is always divisible by

A student was asked to multiply a number by 25.He instead multiplied the number by 52 and got the answer 324 more than correct answer.The number to be multiplied was

Consider the following equations:

1.The equation 1990x-173y=11 has no solution in integers for x and y

2.The equation 3x-12y=7 has no solution in integers for x and y

Which of the above statements are correct?

What is the reaminder obtained when 1421*1423*1425 is divided by 12

The square root of (0.75)³/(1-0.75)+[0.75 + (0.75)² +1] is

What is 5+√10/(5√5-2√20-√32+√50)