Veto q&a 7 Month22 (1)

2018
May
@hang out
Q
Q
Q
Required measurement = (HCF of 496, 403, 713)
litres
= 31 litres
The value of
a) 4 b) 6 c) 8 d) 10
David obtained 76, 65, 82, 67 and 85 marks (out of
100) in English, Mathematics, Physics, Chemistry
and Biology. What is his average mark?
a) 65 b) 69 c) 72
d) 76 e) None of these
Average =
⎛76 + 65 + 82 + 67 + 85 ⎞
⎜
⎟
⎝ 5 ⎠
⎛375
⎞
= ⎜ ⎟= 75
⎝ 5 ⎠
Rohit was 4 times as old as his son, 8 years ago.
After 8 years, Rohit will be twice as old as his son.
What are their present ages?
Lets the son’s age 8 years ago be x years
Then Rohit's age 8 years ago = 4x years
Son’s age after 8 years = (x + 8) + 8
= (x + 16) years
Rohit's age after 8 years (4x+8) + 8
= (4x+16) years
10 + 25 + 108 + 154 + 225
= 10 + 25 + 108 + 154 + 15
= 10 + 25 + 108 + 169
= 10 + 25 + 108 + 13
= 10 + 25 + 121
= 10 + 25 + 11
= 10 + 36
= 10 + 6 = 16 = 4
2(x+16) = 4x+16 ⇔2x =16 ⇔x=8
Hence, son’s present age = (x+8) = 16 years
Rohit's present age = (4x+8) = 40 years
54 Q&AUbdn current affairs & gk
Q The value of 256 is?
a) 512 b) 984 c) 1024 d) 1032
ans: c) 1024
Q
Q
Q
Q
4 ⎝ ⎠ 5
256 4 = 4
4
= 4 4 = 4 = =1024 1025
If 75% of a number is added to 75, then the result
is the number itself. The number is?
a) 50 b) 60 c) 300 d) 400
ans: c) 300
Let the number be x
75
x× + 75 = x
100
75x
+ 75 = x
100
75x + 7500 = 100x
25x = 7500
7500
x = = 300
25
If a radio is purchased for Rs. 490 and sold for Rs.
465.50. Find the loss percent?
CP Rs. = 490, SP = 465.50
Loss = Rs. (490 - 465.50) = Rs. 24.50
⎛24.50 ⎞
∴Loss% = ⎜ × 100 ⎟ % = 5%
⎝ 490 ⎠
A car is running at a speed of 108 km/hr. What
distance will it cover in 15 seconds?
a) 400m b) 450m
c) 550m d) 540 m
ans: b) 450m
Speed = 108 km/hr
= 108× 5 = 30 m/sec
18
Distance = Speed x Time = 30 x 15 = 450 m
Find the sum of first 30 terms of an AP where the
first term is 40 and the common difference is 20?
a) 9000 b) 9200 c) 9900 d) 9400
ans: c) 9900
n
S n
= S
n
= [ 2 a+ ( n−1)
d]
2
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