## 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

4.97821/31.65

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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

## Squares and square roots Answers

 1. M1    M1   M1   A1 04 2. 19.901×10219.901+1=1991.11991.10.072451991.1 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

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