RSMSSB LDC Exam Paper 2018 (H to M) in English (Answer Key)

141 By selling 45 apples for ₹ 40, a person loses 20%. How many apples he should sell for ₹ 24 to gain 20% in the transaction ?
(A) 18
(B) 16
(C) 14
(D) 12

142. A man spends 80% of his income. His income is increased by 20% and he increases his expenditure by 10%. His savings are increased by –
(A) 60%
(B) 32%
(C) 30%
(D) 20%

143. The algebraic sum of the deviations of a set of n values from their mean is –
(A) n+1
(B) n
(C) n-1
(D) 0

144. The arithmetic mean of the following data is –
17; 41, 19, 45, 32, 19, 25, 22, 13, 32.
(A) 24.3
(B) 26.8
(C) 26.5
(D) 32

145. The factors of (x⁴ +9) are –
(A) (x² +3x+3)(x² -3x+3)
(B) (x² +√6x+3)(x² – √6x+3)
(C) (x² +3)(x² -3)
(D) (x² +3)²

146. If one root of equation 5x² +13x+k = 0 is reciprocal of the other root, then the value of k is –
(A) 5
(B) 2
(C) 1
(D) 0

147. There are 2000 mice living in a field. If 1000 mice are born each month and 200 mice die each month, what is the percentage growth rate of mice over a month ?
(A) 10
(B) 30
(C) 40
(D) 20

148 Solution of the equation
| 4x +17 13x-2 | 18 17x-32 is .
(A) x=-1/4
(B) x = 1/4
(C) x = 4
(D) x= -4

149. it D(- ½, 5/2), E(7,3) and F(7/2, 7/2) are the coordinates of the mid-points of sides BC, CA and AB respectively of ΔABC, then the coordinates of the vertex C is –
(A) (4, 11)
(B) (3, 2)
(C) (-4, 3)
(D) (11, 4)

150. n-coplanar straight lines meet at a point. The angles between consecutive lines are – x°, 2x°,…..nx°. The value of n in order that the minimum angle be 24°, is –
(A) 6
(B) 5
(C) 4
(D) 3

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