Quantitative Aptitude
NUMERICAL ABILITY COMBINED MCQs
67 * 67 = 4489
68 * 68 = 4624
Required number
= 4624 - 4523 = 101
7568 = 86 * 88
Sum = 86 + 88 = 174
150% of 174
(174 * 150)/100 = 261
Four years ago,
Father's age = 10x years
Son's age = 3x years
10x + 3x + 8 = 60
=> 13x = 60 - 8 = 52
=>x = 4
Required difference = 7x = 7 * 4 = 28 years
Circumference of circle = 2Ï€r
=> 572 = 2 * 22/7 * r
=> r = (572 * 7)/2*22 = 91
Length of floor = 91+6 = 97 metre = l
2(l+b) = 356
2(97 + b) = 178
=> b = 178 - 97 = 81 metre
Area of floor = 97 * 81 = 7857 sq.meter
Required cost = 12 * 7857 =Rs. 94284
Time taken by car = 528/66 = 8 hours
Case II,
Time = 15 hours
Speed = 66 - 24 = 42 kmph
Distance covered by truck =Speed * Time
= 15 * 42 = 630 km
60 women will do the work in 1 day.
30 women and 90 children together will do the work in 1 day.
Therefore, 60 W = 30 W + 90 C => 30W = 90C => 1W = 3C Therefore, 3W + 9C = 18C
M1 D1 = M2 D2
=> 18 * 10 = 36 * D2 => D2 = (18 * 10)/36 = 5 days
let the cost of 1 sharpener be Rs.x and that of 1 pencil be Rs.y
5x+14y = 56
Multiplying both sides by 3, 15x + 42y = 56 * 3
= Rs. 168
x + x+2 + x+4 + x+6 = 55 * 4
=> 4x + 12 = 220
=> 4x = 220 - 12
=> x = 208 / 4
=> x = 52
P=52 Q=54 R=56 and S=58
Therefore Q * S = 54 * 58 = 3132
Let the number be x
(35+12)% of x = 3055
x*47 / 100 = 3055
=> x = 6500
72% of 6500 = 72 * 6500 / 100
= 72 * 65 = 4680
59 * 59 = 3481
60 * 60 = 3600
Therefore Required number
= 3600 - 3500 = 100