JSS1 MATHEMATICS FIRST TERM CAT 2

TIME: 40 minutes

INSTRUCTION: Answer all questions in Sections A and B.

SECTION A: OBJECTIVE TEST

NO. OF QUESTIONS: 20

1. A binary number is a number in base (a) ten. (b) four. (c) three. (d) two.
2. \(4_{10}\) is ………….. in base two. (a) \(10\) (b) \(101\) (c) \(400\) (d) \(100\)
3. \(\frac{1}{20} = \frac{4}{a}\) Find \(a\). (a) \(60\) (b) \(20\) (c) \(24\) (d) \(80\)
4. Convert \(\frac{1}{4}\) to a decimal fraction. (a) \(1.4\) (b) \(0.5\) (c) \(0.4\) (d) \(0.25\)
5. Simplify \(1000_2 -111_2\) (a) \(100_2\) (b) \(001_2\) (c) \(101_2\) (d) \(0101_2\)
6. Change \(14\) in denary to binary. (a) \(100_2\) (b) \(1110_2\) (c) \(1100_2\) (d) \(1001_2\)
7. Another name for base ten is (a) hexadecimal. (b) decimal. (c) octal. (d) binary.
8. \(10249\) is likely to be in base (a) binary. (b) denary. (c) five. (d) four.
9. Base ………….. consists of only \(0\)s and \(1\)s. (a) four (b) two (c) five (d) denary
10. Add \(\frac{1}{2}\) and \(\frac{1}{4}\). Give your answer in a decimal fraction. (a) \(1.6\) (b) \(0.75\) (c) \(0.74\) (d) \(0.24\)
11. \(1001_2 + 111_2 =\) (a) \(11000_2\) (b) \(10111_2\) (c) \(10000_2\) (d) \(100_2\)
12. \(1_2 + 1_2 + 1_2 =\) (a)  \(100_2\) (b) \(111_2\) (c) \(101_2\) (d) \(11_2\)
13. Express \(\frac{1}{25}\) as a percentage.