Find the one which does not belong to that group ?
Answer: D
41, 43, 47 and 53 are prime numbers, but not 57.
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Find out the wrong number in the series 40960, 10240, 2560, 640, 200, 40, 10
Answer: C
Go on dividing by 4 to get the next number.
So, 200 is wrong.
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Insert the missing number 4, -8, 16, -32, 64, (....)
Answer: B
Each number is the proceeding number multiplied by -2.
So, the required number is -128.
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Find the one which does not belong to that group ?
Answer: B
Except 110, other numbers are divisible by 4.
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Find the odd man out. 396, 462, 572, 427, 671, 264
Answer: B
In each number except 427, the middle digit is the sum of other two.
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Insert the missing number 1, 8, 27, 64, 125, 216, (....)
Answer: B
Numbers are 1⊃3;, 2⊃3;, 3⊃3;, 4⊃3;, 5⊃3;, 6⊃3;.
So, the missing number is 7⊃3; = 343.
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Insert the missing number 10, 5, 13, 10, 16, 20, 19, (....)
Answer: B
There are two series (10, 13, 16, 19) and (5, 10, 20, 40), one increasing by 3 and the other multiplied by 2.
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Find the one which does not belong to that group ?
Answer: B
30 = 3⊃3; + 3, 10 = 2⊃3; + 2, 520 = 8⊃3; + 8 and 130 = 5⊃3; + 5.
30, 10, 130 and 520 can be expressed as n⊃3; + n but not 630.
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Insert the missing number 11, 13, 17, 19, 23, 29, 31, 37, 41, (....)
Answer: A
Numbers are all primes. The next prime is 43.
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Find the one which does not belong to that group ?
Answer: C
The sum of the digits in 508, 328, 706 and 148 is 13, but not in 608.
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