Welcome to your Free MOCK Exams Senior Class WAEC/NECO NAME EMAIL PHONE NUMBER 1. If x is positive, and the standard deviation of x-1, x+1, 3, 2x-1 and x+3 is 2√2, find the value of x and hence calculate the mean deviationx= 4.3, M.D = 3x =4, M.D= 2.4x=6, M.D = 4.2x =6 , M.D = 2.42. If U = {integers ≤ 20}, X = {multiples of 4}, Y = {multiples of 3}. The elements of X' ∩ Y are{3, 5, 7}{12}{3, 6, 9, 15, 18}{}3. The marks scored by students in a test are recorded in the table belowCalculate semi interquartile range13024. P is directly proportional to M and inversely proportional to N. If P = 9 when M = 24 and N = 8, find the value of P when M = 5 and N = 65/21118/55/45. Factorize the polynomial x^{ 3} - 12x+1(x-1)²(x - 1)(x² + x + 1)x-16. The following marks were obtained by candidates in an examination What is the modal group51-6061-7041-5071-807. Find the range of the following datax+2, x-5, x+6, x-2, x-7, x+3, x-10, x-112x-216x+48. The gradient of a curve is given by dy/dx = 10x - 3x². If the curve passes through the origin, find the equation of the curve.y = x³ - 5x²y = 5x² - x³y = x³ + 5x²y = 5x² + x³9. The nth term of the A.P 10, 3, -4, ... is18 + 7n17 - 7n18 - 7n16 - 7n10. The universal set U contains all integers. Subsets of U are defined asP = {x : x ≤ 3}Q = {x : -5 < x < 12}R = {x : -2 ≤ x < 5}Q ∪ R = ?R'RPQ11. When the expression pm² + qm + 1 is divided by m- 1, it has a remainder of 2 and when divided by m + 1 it has a remainder of 4. Find pq1-2-1212. The 2nd and 9th terms of an A.P are 391 and 328 respectively. The 7th term is35534640037313. Find the remainder when 3x³ + 5x² - 11x + 4 is divisible by x + 30-11214. If 14_{twelve }= y_{eight, }the value of y is1520161415. If , find x±2±35±5416. Find the value of x such that 3 or -171 or -2-2 or -1410 or 2017. The ratio of the price of a tin of milk to that of a packet of sugar is m : p. If the price of milk now goes up by 25% while that of sugar goes up by 15%, the new ratio of the prices is3p : 5m23m : 25p25m : 23p5p : 3m18. For what value of x the matrix is a skew symmetric matrix5-5-1119. The value of the expression (9/4) x³ - (9/2) x² - (8/27) x^{-3 }when x = - 2/3 is-20/3-5/37/3620. The cost(y) of feeding n people for a week is given as y = 250 + 80n, where y is expressed in dollar ($). What is the cost of feeding two persons?$80$410$660$16021. A line with equation y = 4x + 2 intersects a curve with the equation y = x² + 2 at the points M and N. Evaluate the area enclosed between the curve and the line1221/411/232/322. IfA = , write the value of det A0x-yx+y123. Given that ax^{4} – 2x^{3} + cx^{2} – 6x – 9 = 0. When x = -1 or 3, calculate the values a and c, respectively.1, 21, 00, -12, -124. Find the value of cosec 90°120-125. The table below shows the frequency distribution of a number of pets in 25 houses Find the mean of the distribution3.123.363.254.1526. If (x-1) and (x+1) are both factors of the equation x³ +px +qx + 6 = , evaluate p and q, respectively3, -4-6, -1-1, 41, -327. Three girls, Tireni, Jessy & Pryanka shared a packet of sweets. If Tireni received 2/5 of the sweets, Jessy received 5/9 of the remainder and Pryanka got 8 sweets. How many sweets were in the packet?2540302028. A school has 43 students in class 3A and 47 students in 3B. The average score in a test is 55 for class 3A and 60 for class 3B. The average score for both classes, correct to one decimal place, is57.557.857.658.129. Given the universal set U = {2, 3, 4, 5, 6, 7, 8, 9} and subsets P = {2, 4, 6, 8} and Q {x : x² < 50, x is odd}, find (P∩Q){}{9}U{0}30. The integral values of y which satisfy the inequality -1 < 5 - 2y ≤ 7 are-1, 0, 2, 3-1, 0, 1, 2, 30, 1, 2, 3-1, 0, 1, 231. A rectangle is formed from a square by increasing the latter's length by 50% while reducing its width by 50%. The ratio of the area of the rectangle to that of the square is3 : 23 : 44 : 32 : 332. The side of a square of length 5 cm is increasing at 0.1m/s. What is the rate of increase of the area of the square?4 cm²2cm²3cm²1cm²33. Z is partly constant and partly varies inversely as the square of D. When D = 1, Z = 11 and when D = 2, Z = 5. Find the value of Z when D = 4525.53.534. The lowest common multiple of the prime numbers between 1 and 10 is357021010535. Subtract the polynomials: (x^{2}y + 3x + 2) - (2 + xy^{2} + 3x)-2x²yx²y-xy²0x²y+xy²36. Find a positive angle between 0° and 360° that is equivalent to -250°110°34°74°283°37. Evaluate the definite integral:354-438. After getting a pay rise of 20%, a man's new annual salary is N21,600. His salary before the pay rise wasN17,280N18,000N17,700N16,68039. Factorize completely 3x^{3} + 4x^{2} – 13x + 6 completely, given that x-1 is a factor(x-1)(x+3)(3x-2)3x+12x-5(x+2)(3x-1)40. Ebuka sold a radio set to Jenny at a profit of 10% and Jenny sold it for $2612.50 at a loss of 5%. The cost of the radio to Ebuka was$2500$2488$2272$237541. Differentiate the function wrt x:x²+22-3x²1/x²2(x - 1/x²)42. Decompose into partial fractions : (5x^{2} + 12x + 3) / x(x + 1)^{2}3/x + 2/(x + 1) + 4/(x + 1)²x + 2/(x + 1)2/(x+7) - 3/x²- 2/(x + 1)²4/(x + 1)² +3/x43. Solve the equation 4 cosx - 3 = 0 for 0° ≤x≤ 360°63°234°12.5°41.4°44. Find the gradient of the curve y = 2√x - 1/x at the point x = 1013245. In the triangle below find the value of a 6.7 cm10.2 cm12.2 cm2.9 cm46 out of 45Time is Up!