Q. Find the wrong term in given number series.
A. 12, 15, 17, 21, 26, 32, 39
Answer 15
EXPLANATION
The pattern of the given series is:
12 + 2 = 14
14 + 3 = 17
17 + 4 = 21
21 + 5 = 26
26 + 6 = 32
32 + 7 = 39
B. 5000, 250, 100, 30, 12, 6, 3.6
Answer 250
EXPLANATION
The pattern of the given series is:
5000 × 0.1 = 500
500 × 0.2 = 100
100 × 0.3 = 30
30 × 0.4 = 12
12 × 0.5 = 6
6 × 0.6 = 3.6
C. 120, 128, 125, 140, 130, 145, 135
Answer 128
EXPLANATION
The pattern of the given series is:
120 + 15 = 135
135 – 10 = 125
125 + 15 = 140
140 – 10 = 130
130 + 15 = 145
145 – 10 = 135
D. 1440, 240, 48, 12, 4, 3, 2
Answer 3
EXPLANATION
The pattern of the given series is:
1440 ÷ 6 = 240
240 ÷ 5 = 48
48 ÷ 4 = 12
12 ÷ 3 = 4
4 ÷ 2 = 2
2 ÷ 1 = 2
Q. On giving a discount of 25% on the MRP of an article, the trader earns a profit of 20%. If the difference between the MRP & CP of the article is 180 Rs. What is the MRP of the article? (in Rs)
Answer 480
EXPLANATION
Direct ratio between MP & CP=
(100+P%) : (100- D%)
= 120 : 75 = 8 : 5
So MP= 8x & CP= 5x
ATQ, 8x-5x= 180
x =60
MP= 8× 60= 480 Rs.
Q. Diameter of a circular field is equal to the side of a of a square field. If the total cost of fencing the circular field is Rs 440 (@ of Rs 5 per meter), what is the perimeter of the square fields? (in metre)
Answer
EXPLANATION
Circumference of Circle=
2×22/7×r =440/5
2r= 28 meter
So Perimeter of square = 28×4= 112 meter
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