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Question 451 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
Ram said to Meera that his age was double of her age 5 years before, and after 5 years his age will be 1.5 times that of her age. What will be the sum of their ages.
50 | |
45 | |
20 | |
40 |
Question 451 Explanation:
according to the given conditions
r-5 = 2(m-5) or r-2m = -5 (1)
and r+5 = 1.5(m+5) or r-1.5m = 2.5 (2)
(2) - (1) gives
0.5 m = 7.5 or m = 15
and r = 25
so r + m = 25+15 = 40
r-5 = 2(m-5) or r-2m = -5 (1)
and r+5 = 1.5(m+5) or r-1.5m = 2.5 (2)
(2) - (1) gives
0.5 m = 7.5 or m = 15
and r = 25
so r + m = 25+15 = 40
Question 452 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
Which term of the A.P. 3, 14, 25, 36.... is 121 more than its 82th term?
93 | |
110 | |
94 | |
62 |
Question 452 Explanation:
Here a = 3, d = 11
So t(54) = 3 + (82 1).11 = 894
Let n be number of terms
So t(n) = 894 + 121 = 1015
=> 3 + ( n1).11 = 1015
=> n = 93
OR
121/11 = 11
so that term would be
82+11 = 93
So t(54) = 3 + (82 1).11 = 894
Let n be number of terms
So t(n) = 894 + 121 = 1015
=> 3 + ( n1).11 = 1015
=> n = 93
OR
121/11 = 11
so that term would be
82+11 = 93
Question 453 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
If $m$ and $n$ are whole numbers and $m^n = 289$, what is the value of $(m - 14)^{n+2}$?
81 | |
8 | |
9 | |
128 |
Question 453 Explanation:
m^n = 289
We know that 17^2 = 289
Hence we can take m = 17 and n = 2
So (m - 14)^(n+2) = (17-14)^2+2 = 3^4 = 81
We know that 17^2 = 289
Hence we can take m = 17 and n = 2
So (m - 14)^(n+2) = (17-14)^2+2 = 3^4 = 81
Question 454 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
If 16+24 = 12, 36+54 = 27 and 20+60 = 25 Then what is the value of: 28+72 =?
30 | |
35 | |
31 | |
14 |
Question 454 Explanation:
16+24 = 4*(4) + 3*(8) = 4+8 = 12,
36+54 = 4*(9) + 3*18()= 9+18 = 27 and
20+60 = 4*(5) + 3*(20) = 5+20 = 25
Similarly 28+72 = 4*(7) + 3*(24) = 7+24 = 31
36+54 = 4*(9) + 3*18()= 9+18 = 27 and
20+60 = 4*(5) + 3*(20) = 5+20 = 25
Similarly 28+72 = 4*(7) + 3*(24) = 7+24 = 31
Question 455 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
What is the next number of the following sequence. 17, 27, 44, 64, 108, 138, .....
256 | |
246 | |
276 | |
269 |
Question 455 Explanation:
17
17+10 = 27
17+27 = 44
44+20 = 64
44+64 = 108
108+30 = 138
108+138 = 246
17+10 = 27
17+27 = 44
44+20 = 64
44+64 = 108
108+30 = 138
108+138 = 246
Question 456 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
Sum of all the integers between 10 and 99, which are divisible by 3 and 5 both, is
315 | |
380 | |
425 | |
295 |
Question 456 Explanation:
15+30+45+60+75+90 = 315
Question 457 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
Water in a canal, 30 dm wide and 12 dm deep is flowing with velocity of 10 km/hr. How much area will it irrigate in 30 minutes, if 8 cm of standing water is required for irrigation?
$225000 m^2$ | |
$0.4 km^2$ | |
$4.25 km^2$ | |
$425000 m^2$ |
Question 457 Explanation:
Width of the canal = 30 dm = 300 cm = 3 m
Depth of the canal 12 cm = 120 cm = 1.2 m
It is given that the water is flowing with velocity 10 km/hr
Therefore Length of the water column formed is 1/2 hour = 5 km = 5000 m
Therefore volume of the water flowing in 1 hour
= Volume of the cuboid of length 5000 m, width 3 m and depth 1.2 m
=> Volume of the water in half hour = (5000*3*1.2) m^3 = 18000 m^3
Suppose x m^2 area is irrigated in 1/2 hour
x*8/100 = 18000
x = 1800000/8
x = 225000
Hence the canal irrigated 225000 m^2 area in 1/2 hours
Depth of the canal 12 cm = 120 cm = 1.2 m
It is given that the water is flowing with velocity 10 km/hr
Therefore Length of the water column formed is 1/2 hour = 5 km = 5000 m
Therefore volume of the water flowing in 1 hour
= Volume of the cuboid of length 5000 m, width 3 m and depth 1.2 m
=> Volume of the water in half hour = (5000*3*1.2) m^3 = 18000 m^3
Suppose x m^2 area is irrigated in 1/2 hour
x*8/100 = 18000
x = 1800000/8
x = 225000
Hence the canal irrigated 225000 m^2 area in 1/2 hours
Question 458 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
Sum of all 120 numbers formed by using 1, 2, 3, 3, 3, and 4 is?
34555606 | |
35555520 | |
45555506 | |
48355520 |
Question 458 Explanation:
Unit place =20(1+2+3+3+3+4)
Tens place=20(1+2+3+3+3+4) +32 ;( 32 is carry from units place)
Hundreds place=20(1+2+3+3+3+4) +35(carry from previous)
Similarly others
Tens place=20(1+2+3+3+3+4) +32 ;( 32 is carry from units place)
Hundreds place=20(1+2+3+3+3+4) +35(carry from previous)
Similarly others
Question 459 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
The average of the marks of maths test of 20 student is 9. If the marks of 5 new students are 9, 5, 3, 2, 1 the the new average marks is
9.5 | |
7.5 | |
6 | |
8 |
Question 459 Explanation:
(20*9)+5+4+3+2+1/25 = 8
Question 460 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
If a/b = 1/3, b/c = 1/2, c/d = 6/7, e/f = 14/9 and d/e = 7/2 and, then what is the value of abc/def?
1/7 | |
2/21 | |
3/7 | |
None of these |
Question 460 Explanation:
a/d = (a/b)*(b/c)*(c/d) = (1/3)*(1/2)*(6/7) = 1/7
b/e = (b/c)*(c/d)*(d/e) = (1/2)*(6/7)*(7/2) = 3/2
c/f = (c/d)*(d/e)*(e/f) = (6/7)*(7/2)*(14/9) = 14/3
So abc/def = (a/d)*(b/e)*(c/f) = (1/7)*(3/2)*(14/3) = 1
b/e = (b/c)*(c/d)*(d/e) = (1/2)*(6/7)*(7/2) = 3/2
c/f = (c/d)*(d/e)*(e/f) = (6/7)*(7/2)*(14/9) = 14/3
So abc/def = (a/d)*(b/e)*(c/f) = (1/7)*(3/2)*(14/3) = 1
Question 461 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
A three digit number is equal to the product of its three digits. How many such numbers are possible?
0 | |
2 | |
8 | |
9 |
Question 461 Explanation:
According to the given condition
100x + 10y + z = xyz
(100 yz)x + 10y +z = 0
x = (10y + z) / (yz 100)
For every integral value of y and z ranging from 0 to 9, x is negative. Hence no such number is possible.
100x + 10y + z = xyz
(100 yz)x + 10y +z = 0
x = (10y + z) / (yz 100)
For every integral value of y and z ranging from 0 to 9, x is negative. Hence no such number is possible.
Question 462 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
A bag contains Rs.1800 in form of one rupee, 50-paise and 25 paise coins in the ratio 3:4:12. The number of 25 paise coin is:
2700 | |
900 | |
1376 | |
675 |
Question 462 Explanation:
Ratio of values of coin = 3/1: 4/2: 12/4 = 3: 2: 3.
Value of 25 paise coin = Rs.(1800*3/8) = Rs.675
Number of these coins = (675*4) = 2700
Value of 25 paise coin = Rs.(1800*3/8) = Rs.675
Number of these coins = (675*4) = 2700
Question 463 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
The rank of the word ABDUL in the dictionary of all the words formed by the letters of the word ABDUL is?
1 | |
37 | |
2 | |
29 |
Question 463 Explanation:
A, B, D are in the correct sequence in the given word, but U and L are in reverse positions, hence rank is 2.
Question 464 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
A car start with a velocity 20Km/Hour and after every hour its speed increases by 10Km/Hour. After 8 hour it starts decreasing the speed 10Km/Hour after every hour and finally it stops in the destination. Total length of the journey is?
800Km | |
1200Km | |
850Km | |
1100Km |
Question 464 Explanation:
20+30+40+50+60+70+80+90+80+70+60+50+40+30+20+10 = 800Km
Question 465 [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER] |
[16% of {36% of 124 + 64% of (112 - 12% of 104)}] will be
12.9 | |
24.9 | |
23.6 | |
17.3 |
Question 465 Explanation:
solve this you will get the answer as 17.3
There are 465 questions to complete.