Squares and square roots Questions
1. Evaluate without using tables or calculators
(4mks)
2. Evaluate using reciprocals, square and square root tables only.
(3mks)
3. Using a calculator, evaluate 
(3mks)
(Show your working at each stage)
4. Use tables of reciprocals and square roots to evaluate
(3marks)
5. Use tables to find;
a) i) 4.9782
ii) The reciprocal of 31.65
b) Hence evaluate to 4.S.F the value of
4.9782 – 1/31.65
6. Use tables of squares, square roots and reciprocals to evaluate correct to 4 s.f
3 – 2
0.0136 (3.72)
7. Without using mathematical tables or calculator, evaluate: 153 x 1.8
giving
your answer in standard form 0.68 x 0.32
Squares and square roots Answers
1. |
| M1 M1 M1 A1 | |||
04 | |||||
2. | 19.901×102 19.901+1=1991.1 1991.1 0.07245 1991.1 x 0.1380 x 102 = 165.77 | M1 M1 A1 | For square For rec | ||
03 | |||||
3. |
| M1 M1 A1 |
| ||
03 | |||||
4. | | B1 B1 B1 | Both reciprocals | ||
5. (a) (i) 24.78
(ii) 0.0316
(b) 24.78 – 0.0316 = 24.75 M1 A1
6. 3 x 1 – 2x 1
1.36 x 10-2 13.84
3 x 8.575 – 2 x 0.07224
= 25.725 – 0.14448
= 25.58052
= 25.58
7. 153 x 1.8
0.68 x 0.32
158 x 1.8 X 10000
0.68 x 0.32 X 10000
158 x 18000 = 9 x 9000
68 x 32 4 x 16
9 x 9 x 103 = 9 x 1 03/2
4 x 16 8
1.125 x 10 3/2
