JAMB - Mathematics (2008)

  • 1
    Add 1101\(_2\),10111\(_2\) and 111\(_2\)
    პასუხი
    (C)
    1010112
  • 2
    If 125\(_x\) = 20\(_{10}\) find x
    პასუხი
    (B)
    3
  • 3
    Evaluate \(\frac{\left(\frac{3}{8}\div\frac{1}{2}+\frac{1}{2}\right)}{\left(\frac{1}{8}\times\frac{2}{3}+\frac{1}{3}\right)}\)
    პასუხი
    (D)
    3
  • 4
    Express 123456 to 3 significant figures
    პასუხი
    (A)
    123000
  • 5
    calculate the simple interest on N7,500 for 8 years at 5% per annum.
    პასუხი
    (A)
    N3,000
  • 6
    The cost of kerosene per liter increased from N60 to N85. What is the percentage rate of increase?
    პასუხი
    (A)
    42%
  • 7
    simplify \(16^{\frac{-1}{2}}\times 4^{\frac{-1}{2}} \times 27^{\frac{1}{3}}\)
    პასუხი
    (A)
    3/8
  • 8
    If log\(_{x^{\frac{1}{2}}}\)64  = 3, find the value of x
    პასუხი
    (B)
    16
  • 9
    If \(\frac{1+\sqrt{2}}{1-\sqrt{2}}\) is expressed in the form of x+y√2 find the values of x and y
    პასუხი
    (A)
    (-3, -2)
  • 10
    If X = {n\(^2\) + 1:n = 0,2,3} and Y = {n+1:n=2,3,5}, find X∩Y.
    პასუხი
    (C)
  • 11
    A book seller sells Mathematics and English books. If 30 customers buy Mathematics books, 20 customers buy English books and 10 customers buy the two books. How many customers has he altogether?
    პასუხი
    (B)
    40
  • 12
    Make Q the subject of formula when \(L=\frac{4}{3}M\sqrt{PQ}\)
    პასუხი
    (A)
    \(\frac{9L^2}{16M^2P}\)
  • 13
    If 2x\(^2\) - kx - 12 is divisible by x-4, Find the value of k.
    პასუხი
    (B)
    5
  • 14
    Factorize completely; (4x+3y)\(^2\) - (3x-2y)\(^2\) 
    პასუხი
    (A)
    (x+5y)(7x+y)
  • 15
    If x - 3 is directly proportional to the square of y and x = 5 when y =2, find x when y = 6.
    პასუხი
    (B)
    21
  • 16
    If p varies inversely as the square of q and = 8 when = 4, find when = 8
    პასუხი
    (D)
    \(\pm\)2
  • 17
    Find the range of values of x which satisfy the inequalities 4x - 7 \(\leq\) 3x and 3x - 4 \(\leq\) 4x
    პასუხი
    (A)
    -4 \(\leq\) x \(\leq\) 7
  • 18
    Solve the quadratic inequalities x\(^2\) - 5x + 6 ≥ 0
    პასუხი
    (A)
    x ≤ 2, x ≥ 3
  • 19
    The fifth term of an A.P is 24 and the eleventh term is 96. Find the first term.
    პასუხი
    (D)
    -24
  • 20
    A binary operation * is defined on the set of positive integers is such x*y = 2x-3y+2 for all positive integers x and y. The binary operation is?
    პასუხი
    (B)
    neither commutative nor closed on the set of positive integers
  • 21
    A binary operation on the real set of numbers excluding -1 is such that for all m, n ∈ R, mΔn = m+n+mn. Find the identity element of the operation.
    პასუხი
    (B)
    zero
  • 22

    In the diagram above, PQ//RS. The size of the angle marked x is?

    პასუხი
    (B)
    80o
  • 23
    Find the exterior angle of a 12 sided regular polygon
    პასუხი
    (D)
    30o
  • 24

    In the diagram above ∠OPQ is?

    პასუხი
    (B)
    53o
  • 25

    Find the area of the figure above
    [π = 22/7]

    პასუხი
    (D)
    84.8 cm2
  • 26
    Find the angle subtended at the center of a circle by a chord which is equal in length to the radius of the circle.
    პასუხი
    (C)
    60o
  • 27
    Find the capacity in liters of a cylindrical well of radius 1 meter and depth 14 meters
    [π = 22/7]
    პასუხი
    (A)
    44,000 liters
  • 28
    The locus of a point equidistant from two points p(6,2) and R(4,2) is a perpendicular bisector of PR passing through?
    პასუხი
    (B)
    (5,2)
  • 29
    Find the gradient of a line which is perpendicular to the line with the equation 3x + 2y + 1 = 0
    პასუხი
    (B)
    2/3
  • 30
    If sinθ = 3/5. Find Tanθ
    პასუხი
    (A)
    3/4
  • 31
    Find the derivative of \(y=\frac{x^7 - x^5}{x^4}\)
    პასუხი
    (C)
    3x2-1
  • 32
    Differentiate sin x - x cos x
    პასუხი
    (B)
    x sin x
  • 33
    Find the minimum value of the function y = x(1+x)
    პასუხი
    (A)
    -1/4
  • 34
    Evaluate \(\int_1 ^2(6x^2-2x)dx\)
    პასუხი
    (D)
    11
  • 35
    Evaluate \(\int^{\frac{\pi}{2}} _{\frac{-\pi}{2}} cos x dx\)
    პასუხი
    (C)
    2
  • 36
    On a pie chart there are six sectors of which four angles are 30°, 45°, 60°, 90° and the remaining two angles are in the ratio 2:1. Find the smallest angles of the remaining two angles.
    პასუხი
    (C)
    45o
  • 37

    The bar chart above shows the number of times the word "a, and , in, it, the ,to" appear in a paragraph in a book.

    What is the ratio of the least frequent word to the most frequent word?

    პასუხი
    (A)
    1/6
  • 38
    What is the mean of the data t, 2t-1, t-2, 2t -1, 4t and 2t+2?
    პასუხი
    (D)
    2t-1/3
  • 39
    Find the median of 4, 1, 4, 1, 0, 4, 4, 2 and 0
    პასუხი
    (C)
    2
  • 40
    If x > 0, find the range of number x-3, 3x+2,x-1, 4x, 2x-1, x-2, 2x-2, 3x and 3x+1
    პასუხი
    (A)
    3x+3
  • 41
    Find the mean deviation of 2, 4, 5, and 9
    პასუხი
    (B)
    2
  • 42
    In how many ways can the letters of the word ACCEPTANCE be arranged?
    პასუხი
    (A)
    10! / (2!2!3!)
  • 43
    Find the number of ways of selecting 6 out of 10 subjects for an examination
    პასუხი
    (D)
    210
  • 44
    The probability of picking a letter T from the word OBSTRUCTION is?
    პასუხი
    (B)
    2/11
  • 45

    The result of rolling a fair die 150 times is as summarized in the table above. What is the probability of obtaining a 5?

    პასუხი
    (B)
    1/5