Business Mathematics

201. If z = (2-3i) and z2-4z+13 = 0 and hence find the value of (4z3-3z2+169)

  1. 0
  2. -1
  3. 10
  4. 9
Correct answer: (A)
0

202. A private taxi charges a fare of Rs. 260 for a journey of 200 km. How much would it travel for Rs 279.50?

  1. 215
  2. 363.35
  3. 186
  4. 240
Correct answer: (A)
215

203. The sum of three numbers in G.P. is 35 and their product is 1000. The numbers are

  1. 5, 10, 20
  2. 20, 10, 15
  3. 10, 5, 0
  4. 20, 10, 10
Correct answer: (A)
5, 10, 20

204. The multiplicative inverse of (-5 / 8) x (16 / 15)

  1. – 2 / 3
  2. 2 / 3
  3. -3 / 2
  4. 3 / 2
Correct answer: (B)
2 / 3

205. The sum of all two digit numbers when divided by 4, yield unity as remainder is

  1. 1200
  2. 1210
  3. 1250
  4. None of these
Correct answer: (B)
1210

206. 52 men can do a piece of work in 12 days. 28 men will do it in

  1. 65 days
  2. 60 days
  3. 56 days
  4. 67 days
Correct answer: (A)
65 days

207. The number of different signals which can be given from 6 flags of different colours taken one or more at a time is

  1. 1958
  2. 1956
  3. 16
  4. 64
Correct answer: (B)
1956

208. The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is

  1. 6
  2. 9
  3. 12
  4. 18
Correct answer: (D)
18

209. If nC12 + nC8 , then n=

  1. 20
  2. 12
  3. 6
  4. 30
Correct answer: (A)
20

210. The middle term of the expansion ( x -1/x )10 is

  1. -252
  2. -250
  3. -248
  4. -262
Correct answer: (A)
-252
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