Insert the missing number.
8, 7, 11, 12, 14, 17, 17, 22, (....)
There are two series (8, 11, 14, 17, 20) and (7, 12, 17, 22) increasing by 3 and 5 respectively.
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2, 4, 12, 48, 240, (....)
Go on multiplying the given numbers by 2, 3, 4, 5, 6.
So, the correct next number is 1440.
Find out the wrong number in the given sequence of numbers.
56, 72, 90, 110, 132, 150
The numbers are 7 x 8, 8 x 9, 9 x 10, 10 x 11, 11 x 12, 12 x 13.
So, 150 is wrong.
52, 51, 48, 43, 34, 27, 16
Subtract 1, 3, 5, 7, 9, 11 from successive numbers.
So, 34 is wrong.
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.
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.
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