Question
How many 8 digit numbers can be formed using the digits
1, 2, 0, 2, 4, 1, 2, 4 ?Solution
There are 8 digits 1, 2, 0, 2, 4, 1, 2, 4 in which 1 occurs 2 times, 2 occurs 3 times and 4 occurs 2 times ∴ Number of 8 digit numbers = 8!/(2! ×3! ×2!) = 1680 But out of these 1680 numbers there are some numbers which begin with ‘0’ and they are not 8 digit numbers The numbers of such numbers beginning with ‘0’ = 7!/(2! ×3! ×2!) = 210 Hence the required number of 8 digit numbers = 1680 – 210 = 1470
Four of the following five are identical in a certain way, so make a group.
Which of these is not related to this group?
Q, M, I, S, T
Four letter-clusters have been given out of which three are alike in some manner and one is different. Select the one that is different.
Four letter-clusters have been given out of which three are alike in some manner and one is different. Select the one that is different.
From the given alternatives, select the number, which does not belong to the same group:
Select the set in which the numbers are related in the same way as are the numbers of the following set. (NOTE: Operations should be performed on the wh...
In the following question, four number pairs are given. In each pair the number on left side of (-) is related to the number of the right side of (-) wi...
Find the odd one out.
Four of the following five are somehow similar and therefore create a group. Which is not related to this group?
CF, IR, MZ, LX, DG
Four letter-clusters have been given out of which four are alike in some manner and one is different. Select the one that is different.
Find out the odd word/letters/number/number pair from the given alternatives.
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