1) Round off 27.048 correct to 3 significant figures. a) 27 b) 27.0 c) 27.1 d) 27.05 2) Evaluate(3-0.168)÷ 40.Give the answer correct to 2 significant figures. a) 0.07 b) 0.070 c) 0.071 d) 0.078 3) 50 x 50 x 50 x 50= m x 10^5.What is the value of m? a) 1.25 b) 6.25 c) 62.5 d) 125 4) 0.00083 is written as A x 10^n in the standard form.Find the values of A and n. a) A=8.3,n=3 b) A=83,n=-2 c) A=8.3 ,n=4 d) A=8.3,N =-4 5) Convert 3.56 x 10^-4 as a single number. a) 0.0356 b) 0.000356 c) 3560 d) 35600 6) (8.4 x 10^-5) ÷ 0.0007= a) 1.2 x 10^-9 b) 1.2 x 10^-2 c) 1.2 x 10^-8 d) 1.2 x 10^-1 7) 4.9 x 10^10 + 2.1 x 10^12= a) 2.149 x 10^22 b) 2.149 x 10^12 c) 7x 10^22 d) 7x 10^12 8) Round off 867.457 correct to four significant figures. a) 867 b) 867.0 c) 867.4 d) 867.5 9) Express 6.241 x 10^-3 as a single number. a) 0.0006241 b) 0.006241 c) 0.6241 d) 6241 10) EXPRESS 0.00000873 IN STANDARD FORM. a) 8.73 x 10^-7 b) 8.73 x 10^-6 c) 8.73 x 10^6 d) 8.73 x 10^7

FORM 3 (CHAPTER 2: STANDARD FORM)

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