MIXED PRACTICE

1. Find the square root of 605.16
2. Factorise 25ab – 50b
3. In what time will the interest on Rs 650 be Rs 312 at 6% rate.
4. Fifteen less than 4 times a number is 9. Find the number.
5. Solve: 3(x + 1) = 12 + 4(x - 1)