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Directions For Questions
Directions : The following bar graph represents number red coloured balls decorated in five different halls.
(Total number of balls in each hall = Number of red balls + number of blue balls)
The following table shows the ratio of number of red balls and number of blue balls decorated in five different halls.
...view full instructions
Find the total number of red balls in all the halls together.
Number of red balls in Hall A = 70
Number of red balls in Hall B = 64
Number of red balls in Hall C = 52
Number of red balls in Hall D = 80
Number of red balls in Hall E = 58
Required sum = 70 + 64 + 52 + 80 + 58 = 324
What approximate value will come in place of question mark (?) in the following questions? (You are not expected to calculate the exact value.)
24.98% of (?)2 = 93.02 + 692.91 ÷ 3.08
25% of (?)2 = 93 + 693/3 = 93 + 231 = 324
?2 = 324 x 100/25 = 1296
? = 36
Find the next term in the series.
5, 6, 20, 87, 412, ?
The pattern is as follows:
(5 x 1) + 13 = 6
(6 x 2) + 23 = 20
(20 x 3) + 33 = 87
(87 x 4) + 43 = 412
(412 x 5) + 53 = 2185
A shopkeeper marked an article at Rs.300 and after giving a discount of 30% he sold that article at 5% profit. If shopkeeper sold the article in order to earn a profit of 20%, then find the percentage increase in selling price of the article.
MP of article = 300
SP = 70% of 300 = 210
profit% = 5%
CP = 210 x 100/105 = 200
New profit% = 20%
New SP = 120% of 200 = 240
Difference between selling price = 240 - 210 = 30
Percentage increase = (30/210) x 100 = 14.28%
11, 18, 45, 164, 795, ?
(11 - 2) x 2 = 18
(18 - 3) x 3 = 45
(45 - 4) x 4 = 164
(164 - 5) x 5 = 795
(795 - 6) x 6 = 4734
If certain principal invested at the rate of 15% per annum compounded annually becomes Rs.55545 in 2 years, then what will be final amount if same principal is invested at the rate of 20% per annum compound interest compounded annually in 3 years?
Let principal be P
Amount after 2 years if it is invested at the rate of 15% per annum compound interest compounded annually.
= P x (1 + (15/100))2
= P x (1 + (3/20))2
= P x (23/20)2 = 55545
P = Rs.42000
Required final amount
= 42000 x (1 + (20/100))3
= 42000 x (6/5)3
= Rs.72576
28, 57, 173, 868, 6080, ?
The pattern multiplies with prime numbers to the previous term and adds an increasing constant as show below:
28 x 2 + 1 = 57
57 x 3 + 2 = 173
173 x 5 + 3 = 868
868 x 7 + 4 = 6080
6080 x 11 + 5 = 66885
What approximate value will come in place of question mark (?) in the following question?
? ≈ (800/8) + 5 x 11 - (140/2) + 41
= 100 + 55 - 70 + 41
=126
640.05 ÷ 32.02 x 46.95 = ? + 29.03
? = 640 ÷ 32 x 47 - 29
= 20 x 47 - 29
= 940 - 29 = 911
The average weight of a group of 12 persons was increased by 2.5 kg when a new person came in place of one of them weighing 44 kg. Again, the new person left the group. What had become the average weight of the remaining person after leaving the new person?
Let the average weight of 12 person =a kg
The sum = 12a kg
After leaving one among them weighing 44 kg
The sum = 12a - 44 kg
Let the weight of new person = b kg
Then, 12a - 44 + b = 12(a + 2.5)
b = 44 + 30 = 74 kg
Again, after leaving the new person
The sum of the weight = 12a - 44 - 74 = 12a - 118 kg
The average = (12a - 118)/11
Without knowing the value of a, we cannot determine the average
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