Find out the wrong number in the given sequence of numbers.
1, 2, 6, 15, 31, 56, 91
1, 1 + 12 = 2, 2 + 22 = 6, 6 + 32 = 15, 15 + 42 = 31, 31 + 52 = 56, 56 + 62 = 92
Last number of given series must be 92 not 91.
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Find the odd man out.
41, 43, 47, 53, 61, 71, 73, 81
Each of the numbers except 81 is a prime number.
2, 5, 10, 17, 26, 37, 50, 64
(1*1)+1 , (2*2)+1 , (3*3)+1 , (4*4)+1 , (5*5)+1 , (6*6)+1 , (7*7)+1 , (8*8)+1
But, 64 is out of pattern.
Find the odd man out?
396, 462, 572, 427, 671, 264.
Here the given series is 396, 462, 572, 427, 671, 264.
In all the terms, the middle digit is the sum of first and third digit except 427.
So the Odd number in the given series is 427.
In a dairy farm, 40 cows eat 40 bags of husk in 40 days. In how many days one cow will eat one bag of husk?
Let the required number of days be x.
Less cows, More days (Indirect Proportion)
Less bags, Less days (Direct Proportion)
cows 1:40 :40:xbags 40:1 :40:x
1 x 40 x x = 40 x 1 x 40
=> x = 40.
A wheel that has 6 cogs is meshed with a larger wheel of 14 cogs. When the smaller wheel has made 21 revolutions, then the number of revolutions mad by the larger wheel is:
Let the required number of revolutions made by larger wheel be x.
Then, More cogs, Less revolutions (Indirect Proportion)
14 : 6 :: 21 : x => 14 x x = 6 x 21
x=6*21/14 => x=9
In a camp, there is a meal for 120 men or 200 children. If 150 children have taken the meal, how many men will be catered to with remaining meal?
There is a meal for 200 children. 150 children have taken the meal.
Remaining meal is to be catered to 50 children.
Now, 200 children = 120 men.
50 children = 12020050 =30men
4 mat-weavers can weave 4 mats in 4 days. At the same rate, how many mats would be woven by 8 mat-weavers in 8 days?
Let the required number of bottles be x.
More weavers, More mats (Direct Proportion)
More days, More mats (Direct Proportion)
weavers 4:8} :4:xdays 4:8}:4:x
4 x 4 x x = 8 x 8 x 4
=> x = 8*8*44*4
=> x = 16.
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