28
280
2800
28000
Correct answer is D
No. of buckets of water = Capacity of reservoirCapacity of buckets
= 800×700×50010×1000
= 28000000010000
= 28000
1080o
1260o
1800o
2160o
Correct answer is B
Each interior angle = 140
(n−2)×180n=140
(n - 2) x 180 = 140n
150 - 360 = 140n
180m - 140n = 360
40n - 360
n = 36040
n = 9
Sum of all interior angles = (n - 2) x 180
= (9 - 2) x 180
= 7 x 180
= 1260
If c and k are the roots of 6 - x - x2 = 0, find c + k
2
1
-1
-3
Correct answer is C
6 - x - x2 = 0
a = -1; b = -1; c = 6
Sum of roots = c + k = -−ba
= −(−1)−1
= -1
If a positive integer, list the values of x which satisfy the equation 3x - 4 < 6 and x - 1 > 0
{1, 2, 3}
{2, 3}
{2, 3, 4}
{2, 3, 4, 5}
Correct answer is B
3x - 4 < 6 = 3x < 6 = 4
3x < 10
x < 103
x < 3.33 and x - 1 = 0
n > 1 = 1< x; since x is an integer, and 1 < x3.33
x = {2, 3}
1
15
-15
-1
Correct answer is A
2x+16−3x−14 = 0
4(2n+1)−6(3x−1)24 = 0
-10x + 10 = 0
-10x = -10
x = −10−10
x = 1