1. Faith thinks of a number, she doubles it and subtract one - third of the number, if the answer is five. What is the number?
2. Simplify 2(x +7)-12 = 4, hence find x
3. Convert 111001(two) to base ten
4. Evaluate 3a - 15a + 5a + 6b
6. Find the product of 8.23 and 0.32
7.Change 235(six) to base ten
8. Find the difference between 9.28 and the sum of 2.31 and 3.92
9. Express 1A8( hex) in base ten
10. Zainab paid N22.44 for four gallons of red oil, how much does each gallon cost