參考答案:

　　參考答案:

　　1.Correct Answer: 55

　　Explanation:

　　Time to be allotted = 20 x 45 seconds for the verbal and 80 x 30 seconds for the math questions. In seconds this is 900 + 2400 = 3300. Divide by 60 to get minutes = 55

　　2.Correct Answer: 2.9

　　Explanation:

　　This is a proportionality problem.

　　If 1 cm represents 100,000 cm

　　Then 2.9 cm represents (100,000/1) x 2.9 = 290,000 cm

　　Now convert to km (1km = 1000m = 1000x 100cm) by dividing by 100,000 = 2.9

　　3.Correct Answer: 6

　　Explanation:

　　x + (x + 1) + (x + 2) = 12

　　3x + 3 = 12; 3x = 9; x = 3

　　The sides are 3-4-5

　　The area = ½ x 4 x 3 = 6

　　4.Correct Answer: 3553

　　Explanation:

　　The next will be 3553. (If you went for 4004, you did not make the palindrome as small as possible)

　　5.Correct Answer: 10

　　Explanation:

　　If we take his current salary as 100 he donates 15.

　　His new salary is 110 and he donates (15/100) x 110 = 16.5

　　His contribution has gone up by 1.5

　　As a percentage of his original contribution this is (1.5/15) x 100 = 10

　　6.Correct Answer: 102

　　Explanation:

　　To find inclusive numbers take the differences and add 1

　　204 - 103 = 101; 101 + 1 = 102

　　7.Correct Answer: 30

　　Explanation:

　　Volume = length x breadth x height = 5 x 2 x 3 = 30

　　8.Correct Answer: 9

　　Explanation:

　　x² - y² = (x + y)(x - y) = 9

　　(x + y)(1) = 9; x + y = 9

　　9.Correct Answer: 0.6

　　Explanation:

　　To find the average add up the score and divide by the number of subjects.

　　76 + 74 + 92 + 81 + 80 = 403; 403/ 5 = 80.6 = M

　　To find the median, put the scores in ascending order and find the middle term:

　　74, 76, 80, 81, 92. The median = 80 = m

　　M - m = 80.6 - 80 = 0.6 (Grid in .6)

　　10.Correct Answer: 3

　　Explanation:

　　From the x-coordinates of points A and D we can work out the length of AD (2). Since BC will also be 2 we can find CD ½ (perimeter – AD + BC) =3

　　Hence the coordinates of point C are 1,3

　　Now we can find the value of w by substituting x = 1 and y = 3 in the equation y = wx² ; 3 = w.1; w = 3