CHAPTER 3: SET

Math and Logic Puzzles

Math and Logic Puzzles

Significant Figure - OneSchoolWiki

Significant Figure - OneSchoolWiki

chapter 2 : Quadratic expression and equation

solve the following quadratic equations.




1.

(a) x(x-3) = 0

(b) (y+3)(y-1)=0

(c) (m+5)² = 0

(d) (n-2)(2n+1)=0

(e) (2p-3)(2p+7)=0

(f) (4q+5)(3q-2)=0



2.

(a) p²+7p+6=0

(b) q²-9q+18=0

(c) h²+h-30=0

(d) k²+6k-16=0

(e) a²-4a-21=0

(f) b²-8b-48=0



3.

(a) x²=4x

(b) m²-m=12

(c) k(k+1)=3(k+5)

(d) w²/4=w+3

(e) 4(7-e)=e(e-1)

(f) (p+6)²=9



4.

(a) 3r²+10r+8=0

(b) 4x²-8x-21=0

(c) 5p²-13p+6=0

(d) 8a²+18a-5=0

(e) 12h²-11h-15=0

(f) 15n²+2n-8=0



5.

(a) 10x²=9(x+1)

(b) m+5-6/m=0

(c) p²-p=p+20/6

(d) b-1/6-2b-1/5b=0

(e) (2y-3)(2y+3)=16

(f) (6k+7)(k-2)=12k

Solving Quadratic Equations

Solving Quadratic Equations

2. Solve each of the following and give your answer to two significant figures.
a) 36.2 x 4.5 ÷0.6


b) 108 ÷ 1.2 + 17.93

c) 16.5 – 9.8 x 0.07

d) 11.5 x 3.42 – 0.01

e) 0.00867 ÷ 78 x 0.046

f) 0.0023 x 567.9 + 67

chapter 1 : standard form

1) Round off the following numbers according to the significant figures stated in the bracket.
a) 0.004768 [3]                                 g) 0.004508 [3]
b) 0.0476 [6]                                     h) 600.2 [1]
c) 0.98457 [3]                                    i) 0.00307 [2]
d) 0.0078479 [4]                                j) 0.004195 [3]
e) 0.1080 [2]                                      k) 27.83 [2]
f) 0.010083 [4]                                   l) 104.025 [3]