**Waec: Maths questions and answers for Waec 2012| General Mathematics Objective and Theory Questions and Answers**

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Waec Mathematics Questions and Answers 2012

**Today Waec Paper is General Mathematic.Thursday 26th aprilGeneralmaths(essay) 9-11:30General maths(obj) 2-3:30**

**you can see the complete waec 2012/2013 TimeTable here Waec TimeTable 2012**

**1. What is the area, in squarefeet, of the triangle whose sideshave lengths equal to 10, 6 and8 feet? A) 480B) 24C) 48D) 30E) 40**

**Question 2.3102 + 9 X 3100 +3103-:-3 = ?A) 3101B) 3102C) 3103D) 3104E) 3105**

**Question 3.Of the 80 students in class,25 are studying German,15 Frenchand13 Spanish.a.) 3 are studying German and French,b.) 4 are studying French and Spanish.c.) 2are studying German andSpanish;d.) and none is studying all3 languages at the same time.**

**How many students are notstudying any of the threelanguages?A) 27B) 18C) 53D) 62E) 36.2012 Waec Mathematics Theory.**

**1.AEvaluate without using table,or calculator(3.69 x 105)/(1.64 x 10-3)leaving your answer in standard form.1b.A man investd 20,000 in bank A and 25,000 in bank B at the beggining of a year,bank A pays simple interest at a rate of y% per annum and B pays 15% per annum.If the total interest at the end of the year from the two banks was 4,600.find d value of y**

**2a:simplify x2-8x+16 X 2-7x +12.**

2b:

if 1/2,

1/x,1/3 are succe term of an arithemetic progression

A.P shows dat 2-x=2x-33.

3a:

A diagram show that a cross section of a railway tunnel if

AB =100M and the radius arc 5.56m.

calculate the correct and nearest perimetre,metre of the cross section.

**4a:why is 60km away from x on a bearingof 135degree z is 80km away from x on a distance of z.**

**4b:bearing of z from y.five out of 24 apples in a box 6 are bad,if 3 apples are taken from the box at random with replacement find the probability that theA) 2 are good and the third is bad,B) the three are bad.C) all 3 are good.**

**Section A Answer all questions inthis part.1a) Simplify 1 3/4-3 1/3 divide 12/3 +2 1/21b)solve x if(5x)base 7=37base 10 2(a)Make Z d sub of formula q=3roots(Z square/v +u)(b)4ras(n-1)multiply 5ras (2n-2) multiply 10ras (n)=1 4**

**a)find the perimeter of a rectangle 24cm and the difference between the length and the width is 2cm.find the length and width of the rectangle 6.A motorist travels for 30km at xkm/h and for 90km at y km/h and take places 2.5hrs for the journey.if the speed are interchanging the journing take two whole no 1 over 6 hrs .find x and y**

**Question 1 (a).Evaluate, without using mathematicaltables or calculator,(3.69 x 105) / (1.64 x 10-3), leaving your answer in the standard form.(b).A man invested N20,000 in bank A and N25,000 in bank B atthe beginning of a year.Bank A pays simple interest at arate of y% per annum and B pays 1.5% per annum.If his total interest at the end of the year from the two banks was N4,600 find the value of y.**

**Question 2(a) Simplify: x 2 – 8x + 16 . x2 -7x + 12 (b) If ½, 1/x, 1/3 are successive terms of an arithmetic progression (A.P.), show that 2 – x = 2 x – 3 3.**

**question 3.The diagram shows the cross-section of a railway tunnel.If |AB| = 100m and the radius of the arc is 56m, calculate, correctto the nearest metre, theperimeter of the cross-section.**

**question 4.Y is 60 km away from X on a bearing of 135°. Z is 80 km awayfrom X on a bearing of 225°.Find the:a.) distance of Z from Y.b.) bearing of Z from Y**

**question 5.Out of the 24 apples in a box, 6 are bad. If three apples are taken From the box at random, with replacement, find the probability that:a.) the first two are good and the third is bad.b.) all the three are bad:c.) all the three are good.**

**1a.) Find Log10’2+Log10’4-Log10’4.1b.) Simplify 7’2/4+7’3/4+(5+1/3)**

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Waec: Maths questions and answers for Waec 2012

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Hi legendkid. This is the real questions and answers for waec.

(1b) Given sinx=2/3, then, sin θ = opp/hyp., by pathegoras, 3 raistopower 2 = 2 raisetopower 2+ a raise 2, 9 = 4 + a raise 2,a = square rut 5, tan x-cos x, (2)/(squar rut5)-(squar rut)/(3),=(squar rut5)/(15)

(1b) Given sinx=2/3, then, sin θ=opp/hyp., by pathegoras, 3 raisetopower 2 = 2 raisetopower 2 + a raisetopower 2, 9 = 4 + a raise 2, a = square rut 5, tan x-cos x, (2)/(squar rut5)-(squar rut)/(3),=(squar rut5)/(15)

(2) let son's years be S& wale's years be W, S=2w— (1),4year's ago, wale*4, S=4* W, (S-4) = (4)(W-4)—(2), S-4=4(W-4),S-4W=4-16, but s=2W, 2W-4W=-12, W=6. therefore, S=12,we have XS + YW= 66, X(12)+Y(6)=66, at X=3 & Y=5, i.e in 3years'time.

(10) class interval: 60-64,65-69,70-74,75-79,80-84,85-89,90-94,95-99. X: 62,67,72,77,82,87,92,97. F: 2,3,6,11,8,7,2,1. FX: 124,201,432,847,656,609,184,97. F(x-x bar) 2: 561.12,414.18,273.36,33.66,84.48,476.42,351.12,333.06,

(10a) Mean=3150/40=78.75.

(10b) S.D = square root of 2527.40/40 = square root of 63.185, S.D = 7.949, to 2 decimal places =7.95

USE THIS MATHEMATICAL SYMBOLS: YOU WILL SEE THIS LIKE THIS:

AX power2 + bx + c = 0 img9

It means X= -b+-square b power2-4ac/2a img1

THIS MEANS: Class Limit:5-10,10-15,15-20,20-25,25-30…..

Frequency: 1,2,4,0,3,5,6

Cummulative Frequency: 1,3,7,7,10,15,21.

This means dat Comma(,) is used for next line. If u see comma, then u know itis unda the one it is follow. Eg like above Frequency:- 2 is unda 1,while 4 is unda 2, then 0 is unda 4.,etc

* means MULTIPLY. / means OVER. X or x means Alphabet X not multiplication. Eg 2*2=4 4/2= 2 2x-x= x Or X+2x = 3x.

(3a) let STU = θ,

y = 36 + θ,

but θ = 44, hence